WASHINGTON (AP) — In riveting testimony, a former national security official declared Thursday that a U.S. ambassador carried out a controversial “domestic political errand” for Donald Trump on Ukraine, an allegation undercutting a main line…

WASHINGTON (AP) — National security adviser John Bolton was so alarmed by Rudy Giuliani’s back-channel activities in Ukraine that he described President Donald Trump’s personal lawyer as a “hand grenade who is going to blow…