US President Donald Trump warned evangelical leaders that if Republicans lose control of Congress in the midterm elections, Democrats will institute change "quickly and violently," The New York Times has reported.

US Senator John McCain will miss a key vote on the Republican tax bill because of a viral infection, further narrowing the already-thin margin of support for the controversial plan.

"It's too early" since the massacre to address gun control, one Senate Republican warned. "I really don't know" what would work, admitted another. "It's hard to prevent anything," shrugged a third.

Voters in Georgia will decide the most expensive US congressional race ever Tuesday, a $60-million political brawl where a Democratic novice could score an upset in a conservative stronghold and strike a blow against Donald Trump's presidency.

US Democrats, licking their wounds from last year's election debacle, will pick a new leader Saturday to take the fight to President Donald Trump and his Republicans.

Republicans on Saturday rejected reports about a secret CIA assessment finding that Russia sought to tip the US presidential election in Donald Trump's favor, as a Democratic Senate leader called for an investigation.

Republicans thwarted Democratic efforts to retake Congress in Tuesday's historic US election, using a show of conservative force to maintain control of the Senate and House of Representatives.

Police in the southern US state of North Carolina on Sunday were investigating a firebomb attack on a Republican Party office, with the message "Nazi Republicans leave town or else" sprayed on an adjacent building.

Some of the Republican Party's biggest financial donors urged its national committee on Thursday to drop Donald Trump in the wake of accusations he sexually assaulted women, The New York Times reported.

In a break from tradition, USA Today took a stance Friday in the upcoming presidential election, warning readers to "resist the siren song of a dangerous demagogue" and reject Republican Donald Trump.

It's 10 days to America's next presidential debate, but some of Donald Trump's most ardent admirers agree: he must do better -- focus more on policy, and hit Hillary Clinton harder.

Donald Trump released lab results Thursday from a recent medical examination, with his personal physician stating that the Republican presidential candidate "is in excellent physical health."