After leaving Texas for Illinois to prevent a legislative vote on a Republican redistricting plan, state House Democratic leader Gene Wu needed a means to project his voice — and viewpoints — to a national audience. So he tapped his campaign account to buy a microphone for news conferences.

President Trump on Tuesday said the FBI “may have to” get involved in Texas Republican officials’ efforts to arrest state Democrats who fled Texas to delay the GOP-controlled legislature’s scheme to redraw congressional maps to benefit Republicans.