US president signaled a ‘long speech’, expected to start at 9pm ET, which will double as pitch to voters ahead of midterms later this year

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Democratic senator Mark Kelly also confirmed to reporters that he plans to attend the State of the Union later.

Kelly said that Trump wants to see him “sitting in prison right now”, after the president branded the Arizona lawmaker “seditious” for taking part in a video where several Democratic members of Congress urged members of the military to defy illegal orders.