By Ned Parker, John Shiffman, Mike Spector, Peter Eisler and Linda So

DALLAS, Nov 8 (Reuters) - As Republicans faced a nationwide drubbing in Tuesday's midterm elections, supporters streamed out of a Dallas ballroom where they'd hoped to toast a win for US Senate candidate Ken Paxton, a favorite of President Donald Trump.

In the hotel bar, Michael Little, a 59-year-old businessman and three-time Trump voter, stared at the president's image on a television screen. "People are pissed off at Trump. Trump has cost us," he said, capturing a sentiment rippling through the president's Make America Great Again movement after the Republican Party's worst electoral defeat in decades.

Across the coalition, some supporters who once viewed Trump as MAGA's greatest asset are beginning to question whether he's become its biggest liability.

The midterm losses amounted to more than a repudiation of Trump. They were a r...