GOP senators say there is less enthusiasm for former President Trump among Republican-leaning voters compared to 2016, a drop in voter energy that was apparent when only 15 percent of Iowa’s registered Republicans showed up for Monday’s caucuses.

Lawmakers acknowledge the weather was a factor behind the low turnout in Iowa but point to other signs of diminished enthusiasm for Trump, something that could hurt down-ballot Republican candidates in swing states.

Senate Republicans hope that Trump’s problems will be balanced by lower enthusiasm among Democrats for President Biden, though they expect Trump being atop the ticket will drive Democratic voters to the polls in large numbers.

Another concern among GOP senators is that Biden will have a big fundraising advantage over Trump, who is pouring his resources into his legal defense in the face of four criminal trials and two civil cases.