Pollster Michael Cornfield said on Friday that Republican turnout during November's midterm elections could be driven down if Supreme Court nominee Brett Kavanaugh is confirmed by the Senate.

"If Kavanaugh is confirmed, perhaps Republicans will feel less of a need to turn out," Cornfield, co-director of the George Washington University Poll, told Hill.TV's Jamal Simmons on "What America's Thinking."

"What will keep them angry? What will keep them motivated? If he's turned down, they may surpass Democrats intensity," he continued.

"So, really, we have to hang on this every week," he said.

Kavanaugh's confirmation process in the Senate was roiled last month after three women accused him of sexual misconduct, though he has strongly denied the accusations.

Many Republicans have forcefully defended Kavanaugh, saying he is the victim of partisan politics.

Polling shows that Republican voters have become more energized throughout his rocky confirmation process.

An NPR–PBS News Hour–Marist poll released on Wednesday found that 80 percent of Republicans said the November elections were "very important," while 82 percent of Democrats said the same.

The gap between the two parties was much larger in July, when 78 percent of Democrats said the elections were "very important," while 68 percent of Republicans said the same.

Senators on Friday voted to end debate on Kavanaugh's nomination, clearing the way for a confirmation vote on Saturday.

— Julia Manchester