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Wall Street is worried about a trade war.The Dow dropped 420 points on Thursday after President Trump said his administration will impose tariffs on steel and aluminum imports. The Nasdaq and the S&P 500 declined 1.3% apiece.Trump's controversial tariff announcement caught investors off guard and immediately raised concerns about retaliation from China or other major U.S. trading partners."This is the first shot across the bow over a trade war," said Art Hogan, chief market strategist at B. Riley FBR. "And nobody wins a trade war."Trump said his administration would impose a 25% tariff on steel imports and a 10% tariff on aluminum. It was not immediately clear whether Trump would exempt some countries from the tariffs, as his national security advisers have urged him to do to avoid hurting U.S. allies.Corporate America has warned Trump that tariffs could backfire. Last month, the Business Roundtable warned of the risk of "foreign retaliation" that would "harm the U.S. economy."Investors will be looking to see how U.S. trading partners react to the tariffs.Beyond worries about retaliation, the tariff news drove concerns about rising costs for companies that rely heavily on aluminum and steel, like auto and plane makers. Imports make up about a third of the steel American businesses use every year, and more than 90% of aluminum used here. Shares of Boeing fell 3% General Motors dipped 4%, and Ford dropped 3%.Related: NY Fed chief: Tariffs risk 'trade war'If the tariffs result in higher prices on steel and aluminum, companies that rely on those products may pass on some of the costs to consumers. That raises the specter of creeping inflation."This clearly will [lead to] higher prices in the production chain, which is part of the inflation path," said Quincy Krosby, chief market strategist at Prudential Financial.The timing of the tariff news surprised Wall Street. A formal announcement was expected at some point Thursday, but then it was called off. Later, Trump mentioned his tariff plans in a hastily arranged listening session with steel and aluminum executives. And he didn't provide crucial details, such as whether certain countries will be exempted.Concerns about trade come at an already shaky time on Wall Street. The S&P 500 and Dow fell about 4% in February, their worst month in two years. Fears about inflation and soaring bond yields caused a surge in volatility, including two 1,000-point plunges for the Dow.The market had come back as investors focused on the strong economy and booming corporate profits. But stocks fell sharply again on Tuesday and Wednesday, putting the Dow is back in negative territory for the year.Turbulence has picked up as well. The VIX volatility index spiked 15% on Thursday. Selling pressure will climb as volatility increases, Krosby said.At least two corners of the stock market cheered Trump's tariff announcement. U.S. Steel and AK Steel soared 6% and 10%, respectively.Century Aluminum also spiked 7%. Another major aluminum maker, Alcoa, gained 1%.Trump's tariff moves could force investors to confront another trade issue: NAFTA. Trump has repeatedly threatened to tear up this major trade deal with Canada and Mexico. Talks to renegotiate NAFTA, a major piece of the U.S. economy, have so far failed to produce a solution."It sets off the protectionist fears that had been lying dormant," said Hogan.— CNN's Jeremy Diamond contributed to this report.The-CNN-Wire? & ? 2018 Cable News Network, Inc., a Time Warner Company. All rights reserved. 3547

WASHINGTON (AP) — A federal judge has ruled that former national security adviser John Bolton can move forward in publishing his tell-all book. The Trump administration had tried to block the release because of concerns that classified information could be exposed. The decision from U.S. District Judge Royce Lamberth is a victory for Bolton in a court case that involved core First Amendment and national security concerns. The ruling means a broader election-year readership and distribution for a memoir that paints an unflattering portrait of President Donald Trump's foreign policy decision-making during the turbulent year-and-a-half that Bolton spent in the White House. 686

WASHINGTON (AP) — A top White House aide defends President Donald Trump's tweets about an influential black Democratic congressman and his Baltimore district as a justified response to the lawmaker's criticism of administration border policies.Acting chief of staff Mick Mulvaney says Trump was upset over what he perceives to be inaccurate statements by Rep. Elijah Cummings about conditions in which children are being held in detention at the U.S.-Mexico border.Mulvaney tells "Fox News Sunday" that "when the president hears lies like that, he's going to fight back."At a hearing last week, Cummings accused a top administration official of wrongly calling reports of filthy, overcrowded border facilities "unsubstantiated."Mulvaney denies that Trump's Twitter comments Saturday were racist and says Trump would criticize any lawmaker who spoke unfairly about his policies. 885

WASHINGTON (AP) — A more conservative Supreme Court appears unwilling to do what Republicans have long desired — kill off the Affordable Care Act. That includes its key protections for pre-existing health conditions and subsidized insurance premiums that affect tens of millions of Americans. The justices met a week after the election and remotely in the midst of a pandemic that has closed their majestic courtroom to hear the highest-profile case of the term so far. They took on the latest Republican challenge to the law known as “Obamacare,” with three appointees of President Donald Trump, an avowed foe of the health care law, among them.But at least one of those Trump appointees, Justice Brett Kavanaugh, seemed likely to vote to leave the bulk of the law intact, even if he were to find the law’s now-toothless mandate that everyone obtain health insurance to be unconstitutional.“It does seem fairly clear that the proper remedy would be to sever the mandate provision and leave the rest of the act in place,” Kavanaugh said.Chief Justice John Roberts, who wrote two earlier opinions preserving the law, stated similar views, and the court’s three liberal justices are almost certain to vote to uphold the law in its entirety. That presumably would form a majority by joining a decision to cut away only the mandate, which now has no financial penalty attached to it. Congress zeroed out the penalty in 2017, but left the rest of the law untouched.“I think it’s hard for you to argue that Congress intended the entire act to fall if the mandate were struck down when the same Congress that lowered the penalty to zero did not even try to repeal the rest of the act. I think, frankly, that they wanted the court to do that, but that’s not our job,” Roberts said.Tuesday’s arguments, conducted by telephone and lasting two hours, reached back to the earlier cases and also included reminders of the coronavirus pandemic. The justices asked about other mandates, only hypothetical, that might have no penalties attached: To fly a flag, to mow the lawn or even, in a nod to current times, to wear a mask.“I assume that in most places there is no penalty for wearing a face mask or a mask during COVID, but there is some degree of opprobrium if one does not wear it in certain settings,” Justice Clarence Thomas said.The court also spent a fair amount of time debating whether the GOP-led states and several individuals who initially filed lawsuits had the right to go into court. 2495

WASHINGTON — In an official update on his health status since contracting COVID-19, President Donald Trump told his personal physician “I feel great” Wednesday morning.In a statement shared on Twitter, Dr. Sean Conley also said the president’s vital signs remain “stable and in the normal range.” He added that Trump has not had a fever in more than four days and has not needed “supplemental oxygen since initial hospitalization.”Meanwhile, the president is remaining inside the White House as he recovers and has no public events scheduled Wednesday. Aides are being told to take extensive precautions to prevent themselves from catching the coronavirus. 664