House Speaker Paul Ryan of Wis., followed by Rep. Cathy McMorris Rodgers, R-Wash., chair of the Republican Conference, finishes a news conference at Republican National Committee Headquarters in Washington, Wednesday, May 17, 2017. Ryan said Congress "can't deal with speculation and innuendo" and must gather all relevant information before "rushing to judgment" on President Donald Trump's firing of FBI Director James Comey. (AP Photo/J. Scott Applewhite)
House Speaker Paul Ryan of Wis., followed by Rep. Cathy McMorris Rodgers, R-Wash., chair of the Republican Conference, finishes a news conference at Republican National Committee Headquarters in Washington, Wednesday, May 17, 2017. Ryan said Congress "can't deal with speculation and innuendo" and must gather all relevant information before "rushing to judgment" on President Donald Trump's firing of FBI Director James Comey. (AP Photo/J. Scott Applewhite) Credit: J. Scott Applewhite

WASHINGTON — It’s striking how many congressional Republicans are concerned about President Donald Trump’s behavior of late. It’s even more striking how many are not.

Republican leaders in the House and Senate are pledging a thorough investigation of Trump’s firing last week of FBI Director James Comey, along with revelations that the president disclosed classified information to the Russians and asked Comey to back off a sensitive investigation. GOP committee chairmen in the House and Senate issued invitations Wednesday for Comey to testify in open session on Capitol Hill, and Senate Majority Leader Mitch McConnell seconded the call to hear from the former FBI chief.

Late Wednesday the Justice Department announced the appointment of a special counsel, former FBI Director Robert Mueller, in the case.

But ask some GOP lawmakers, particularly House members from conservative districts or senators from GOP-leaning states, and they don’t need an investigation to tell you there’s no there there.

“At this point I have not seen anything that is that alarming,” said Rep. Robert Aderholt of Alabama.

“I’m convinced that the president did nothing that he thought was outside the best interest of the country,” said Rep. Trent Franks, R-Ariz.

“A lot of times he’s the victim of not being a career politician,” Rep. James Comer of Kentucky said of Trump.

“You guys are barking up the wrong tree,” Sen. James Risch of Idaho told a group of reporters asking about the various controversies.

Risch insisted the “real story” is leaks coming out of the administration. And citing a Washington Post story about Trump revealing classified information to Russian diplomats in the Oval Office a day after firing Comey, Risch said it had been disclosed by “a weasel … a traitor. They’ve committed treason and ought to go to prison.”

The nonchalance coming from those Republicans and others is notable at a moment when the White House appears immersed in the most serious crisis of Trump’s young presidency. Sen. John McCain of Arizona, the Republican chairman of the Armed Services Committee, says it’s a “scandal” of Watergate proportions, and the only way to end it is to get out the full truth.

But other Republicans see it differently. In many cases, they represent states or districts that voted strongly for Trump, and where the GOP base still ardently supports the president. An ABC News/Washington Post poll late last month found that despite Trump’s low approval ratings relative to other presidents early in their administrations, 96 percent of those who voted for him last November stand by their support.

In GOP Rep. Barry Loudermilk’s Georgia district, Trump won with 60 percent of the vote. Loudermilk said Wednesday that after spending an 11-day recess back home, he’s convinced his voters remain strongly supportive of the president.

“Definitely, there’s no question,” Loudermilk said. “After spending this last week in the district I can tell you.”

Some of these Republicans say the Russia issues are barely registering with their voters, who have grown accustomed to tuning out the media uproar of the day surrounding Trump. For many of these lawmakers, the potential for a conservative primary opponent is greater than any threat from a Democrat.

And so Democrats’ clamor for Republicans to stand up to the president does not resonate.