Congressional Republicans are re-evaluating Marco Rubio Marco Antonio RubioFlorida senators pushing to keep Daylight Savings Time during pandemic Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Intelligence chief says Congress will get some in-person election security briefings MORE’s presidential campaign in the wake of his dismal showing in New Hampshire and disastrous debate performance over the weekend.

The GOP establishment rallied around the freshman Florida senator last week after he outperformed polls in Iowa by finishing a strong third in that state’s caucuses.

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Now they’re questioning whether he can stand up to the pressure of facing off against the Democratic nominee — likely Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE — in the general election.

“People who have already endorsed [Rubio] are probably concerned to see how he can come out of South Carolina. I think there’s a definite level of concern,” said Sen. Shelley Moore Capito Shelley Wellons Moore CapitoSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure Hillicon Valley: Zuckerberg acknowledges failure to take down Kenosha military group despite warnings | Election officials push back against concerns over mail-in voting, drop boxes MORE (R-W.Va.), who has not endorsed in the race.

South Carolina will host the next Republican presidential primary, on Feb. 20.

Some lawmakers are giving a second look at former Florida Gov. Jeb Bush, who had been largely written off ahead of Tuesday’s primary.

Bush beat expectations by finishing in a virtual tie for third place in the Granite State, just ahead of Rubio, with 11 percent of the vote.

“It obviously breathes more life into his campaign, to push him down to South Carolina,” Capito said of Bush.

But Rubio’s stumble in New Hampshire — which came after New Jersey Gov. Chris Christie effectively humiliated him on the debate stage — revived questions about his readiness.

“There’s questions not about his ability but about his lack of experience,” Rep. Walter Jones (R-N.C.) said of Rubio.

Jones had endorsed Sen. Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (R-Ky.) but is weighing other candidates now that Paul has dropped out.

Sen. Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE (R-Ala.), an outspoken conservative who is neutral in the race, said “it looks like” people are reassessing Rubio’s chances.

“He had big momentum out of Iowa, and it wasn’t maintained,” he said. “It’s funny how people can peak and never recover.”

Steve Schmidt, a veteran GOP strategist who ran Sen. John McCain John Sidney McCainThe electoral reality that the media ignores Kelly's lead widens to 10 points in Arizona Senate race: poll COVID response shows a way forward on private gun sale checks MORE’s (R-Ariz.) 2008 presidential campaign, said Rubio needs a miracle.

“A fifth place finish in New Hampshire means effectively he’s bleeding out,” Schmidt said of Rubio on MSNBC’s “Morning Joe.”

The Florida senator finished with 10.6 percent of the vote in New Hampshire. In the run-up to the contest, polls showed him in second place, with an average of 14 percent.

“That campaign is effectively over unless he can pull off a miracle and win the Nevada caucuses,” Schmidt added. “He doesn’t have a path in South Carolina.”

McCain, who won his party’s nomination in 2008, said Rubio has only

himself to blame for the way he froze when Christie attacked him as a scripted, overly cautious candidate.

“He himself said, ‘Nobody but me. I take responsibility for it.’ I agree with him,” McCain said of Rubio.

Rubio’s GOP critics are making the argument on Capitol Hill that he’s not ready to run for president, particularly given the hostile media environment.

“Democrats can run a younger person like John F. Kennedy because the media is with them,” said Sen. Orrin Hatch Orrin Grant HatchBottom line Bottom line Senate GOP divided over whether they'd fill Supreme Court vacancy MORE (R-Utah), a Bush backer. “Republicans will have a more difficult time because if somebody’s young, they’re going to get beaten up like never before by this biased media.”

Rubio on Wednesday morning blamed an unrelenting media barrage for his disappointing showing Tuesday.

“What happened is, obviously, Saturday night, the debate went the way it went, and then just the media coverage over the last 72 hours was very negative about it,” he said Wednesday morning on “Fox & Friends.”

Rubio’s allies, who have been working to round up endorsements in Congress, argued Wednesday that his debate gaffe and fifth-place showing would have only a temporary impact.

“These things are pretty short-lived. I think it’s had the impact it’s going to have. This guy’s good. I’ve seen him give lots and lots and lots of speeches,” said Sen. Jim Risch James (Jim) Elroy RischWhy the US should rely more on strategy, not sanctions Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump Senators blast Turkey's move to convert Hagia Sophia back into a mosque MORE (R-Idaho), who has endorsed Rubio.

Risch acknowledged, however, that Bush’s performance gave him a ticket to stay in the race.

“He over-performed, so he’ll come out of there with something,” he said.

Last week, Risch predicted Bush wouldn’t finish in New Hampshire’s top three.

Bush’s allies claimed their candidate is now perfectly set up to perform well in South Carolina, a state his father and brother won in past presidential elections and one that has an impressive track record in picking the eventual GOP nominee.

“Jeb Bush has a very good chance of being nominated because he did well,” said Rep. Mario Diaz-Balart (R-Fla.). “I think he’s going to do well in South Carolina. He has the depth of support and the organization.”

Rubio had been the target of an intense negative advertising campaign by Bush and Christie. His backers say those attacks may abate now that Christie has dropped out and Bush has incentive to focus instead on Ohio Gov. John Kasich, the second-place finisher in New Hampshire.

Kasich is now trying to claim the mantle as the leading mainstream Republican alternative to front-runners Donald Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE and Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE. But GOP lawmakers question whether his second-place finish in New Hampshire will translate to success in South Carolina and other states.

They noted that Kasich held more than 100 town-hall events in New Hampshire and doesn’t have much of a political operation in South Carolina or states voting later in March.

“Kasich did well, but whether that victory will have legs in South Carolina and the SEC primaries is in doubt,” Sessions said.