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Biden is expected to make his announcement by video and would bring an end to months of speculation about whether he would challenge Trump, who followed Obama in the White House following his 2016 victory over Democrat Hillary Clinton.

Biden, in his tweet, said they needed Warren's voice in the race and that they "need her continued work in the Senate."

Bezos’ congratulatory message strays somewhat?from his tone on Trump in the past. After Trump’s December volley, Bezos made the joke on Twitter that he would “reserve him a seat on the Blue Origin rocket,” another venture that the Amazon founder is pursuing?with his private fortune. In May, Bezos said Trump’s remarks were “not an appropriate way for a presidential candidate to behave.”

Beyond providing standard cloud services, Alibaba will offer British partners insight into the Chinese market, according to Sean Harley, chief information officer at Ascential, a London-based marketing optimization service that uses Alibaba Cloud in China.

Bettel said the two countries have strong economic complementarity, and his country is ready to expand cooperation in areas including finance, investment, science and technology, tourism and cultural exchanges. Luxembourg is also ready to boost cooperation within the framework of the Belt and Road Initiative, he said.