Donald Trump, fresh off Thursday night’s Republican slime-fest debate, is expected to dominate the GOP presidential sweepstakes today, as voters in four states, including Maine, head to caucuses and hit the polls.

Kansas, Kentucky and Maine all hold caucuses today, while Louisiana goes to the voting booth just two days after Trump traded low-blow insults with Florida U.S. Sen. Marco Rubio and Texas U.S. Sen. Ted Cruz at their 11th presidential debate.

Polls conducted in the past week show Trump holding a 13-point lead in Kentucky, ahead by as many as 12 points in Kansas and boasting a 20-point edge in Louisiana.

In Kentucky, the blustery billionaire will likely benefit from the same type of popularity and support he received on Super Tuesday, but he faces some obstacles. Kentucky holds caucuses, in which Trump traditionally doesn’t perform as well. And like Oklahoma — where he lost to Cruz — it’s a closed contest, so only registered Republicans, not unenrolled, can take part. There’s also no same-day voter registration.

“Trump has done worse in places where independents couldn’t weight the contest and swing support his way,” said Stephen Voss, a University of Kentucky political science professor. “I suspect Trump will do well, but maybe not as well as he’s done in southern states.”

He is likely to fare better in Louisiana, according to Voss.

“The Trump appeal is likely to be even stronger,” he said. “There’s a large Catholic population, a large urban population. These are more the Trump voters, and less the Cruz religious-right voters.”

Maine awards just 23 delegates — half as many as Kentucky and Louisiana — and is anotherTrump stronghold. He held a rally in Portland on Thursday and was endorsed by controversial Gov. Paul LePage.

“I expect Trump to come out on top tomorrow,” said John Baughman, a political science professor at Bates College in Lewiston. “I think the Trump support has a certain kind of momentum of its own.”

Democrats, meanwhile, hold caucuses in Kansas and Nebraska and a primary in Louisiana today, while Maine Democrats host caucuses tomorrow.

Hillary Clinton has all the momentum against Vermont U.S. Sen. Bernie Sanders. “His best shot is in Maine,” Baughman said, “given it’s a northern New England, very white state, and, especially in southern Maine. Sanders has a lot of support here. But he has to pick up other states (and) do it with a sizable margin to make up some ground.”