WASHINGTON - President Donald Trump was in a White House event with governors Thursday when he took a moment to punch out a tweet from his cellphone - threatening to decouple the U.S. economy from China, the world's second largest economy.

WASHINGTON - For months, as the nation was convulsed by the impeachment of President Donald Trump, his critics held out hope that the congressional proceedings would unearth a high-level witness with first-person testimony about Trump's efforts to use his office to try to pressure Ukraine to launch investigations that could bolster him politically.