A majority of Senate Republicans will be attending the party’s national convention in Cleveland this month, despite the reservations that many of them have about Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE.

A survey by The Hill found that 32 Senate Republicans plan to attend the convention in Cleveland later this month, while 18 will skip it. Four Republican senators said they had not yet decided.

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Only two senators facing competitive races in the fall will attend: Rob Portman Robert (Rob) Jones PortmanMcConnell locks down key GOP votes in Supreme Court fight Romney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery MORE (Ohio) and Richard Burr Richard Mauze BurrRep. Mark Walker says he's been contacted about Liberty University vacancy Overnight Defense: Trump rejects major cut to military health care | Senate report says Trump campaign's Russia contacts posed 'grave' threat Senate report describes closer ties between 2016 Trump campaign, Russia MORE (N.C.).

Portman will spend most of his time away from the main show, focusing on campaign events such as building a Habitat for Humanity home for a family in need and kayaking on the Cuyahoga River to help war veterans.

Burr said he would be at the convention only briefly.

Two vulnerable GOP incumbents, Sens. Ron Johnson Ronald (Ron) Harold JohnsonGOP set to release controversial Biden report Democrats fear Russia interference could spoil bid to retake Senate The Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill MORE (Wis.) and Pat Toomey (Pa.), told The Hill in April that they anticipated going to the convention. In the past week they said their plans had changed.

Trump’s stock in the Senate took a hit a month ago when he criticized an Indiana-born federal judge as unfit to preside over a lawsuit against Trump University because of his Mexican heritage.

Republican lawmakers are growing increasingly skeptical about Trump’s ability to win, especially after his latest campaign finance report revealed he had only $1.3 million cash on hand.

But the convention offers lawmakers a valuable chance to meet with donors and activists who can be helpful in the future. Sen. Ted Cruz Rafael (Ted) Edward CruzMurkowski: Supreme Court nominee should not be taken up before election Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (Texas), who could run for president again in four years, will be in Cleveland to thank supporters and has been given a speaking slot.

The most active participants at the convention include Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellOcasio-Cortez to voters: Tell McConnell 'he is playing with fire' with Ginsburg's seat McConnell locks down key GOP votes in Supreme Court fight Video shows NYC subway station renamed after Ruth Bader Ginsburg MORE (Ky.) and Sen. Thom Tillis Thomas (Thom) Roland TillisMcConnell locks down key GOP votes in Supreme Court fight Will Republicans' rank hypocrisy hinder their rush to replace Ginsburg? Trump supporters chant 'Fill that seat' at North Carolina rally MORE (N.C.), who will serve as delegates, and Sen. Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE (Ala.), an early Trump supporter who will chair the Alabama delegation.

“An awful lot of political activists important in their home states are there. To pass up the convention means missing an opportunity to get connected to people who might be important in the future,” said Steven S. Smith, a political science professor at Washington University in St. Louis.

“There are some risks in going and being associated with a presidential candidate who may still go down in flames,” he said. “You can lay low. You don’t have to look for photo opportunities with Donald Trump.”

Democrats are using Trump, the GOP’s presumptive nominee for president, as their primary attack against Republican candidates.

“Whether or not they’ll be in Cleveland, Republican senators continue to support Trump’s bigoted and divisive candidacy, align with him on many of his out-of-touch policies, and are still holding a Supreme Court seat for him to fill,” said Democratic Senatorial Campaign Committee spokesman Sam Lau.

Here’s a look at which Republican senators will be on hand for Trump’s big show.