Sen. Lindsey GrahamLindsey Olin GrahamGraham says he wants to see Bolton manuscript Bolton upends Trump impeachment trial  Juan Williams: Democrats can't let Trump off the hook MORE (R-S.C.) expressed shock on Monday that he is trailing his fellow GOP presidential candidates Ben CarsonBenjamin (Ben) Solomon CarsonAid restrictions sideline Puerto Rican civil society Trump administration ending delay on over B in Puerto Rico disaster aid HUD to roll back Obama-era housing desegregation rule MORE and Donald TrumpDonald John TrumpWarren: Dershowitz presentation 'nonsensical,' 'could not follow it' Bolton told Barr he was concerned Trump did favors for autocrats: report Dershowitz: Bolton allegations would not constitute impeachable offense MORE.

“On our side, you’ve got the No. 2 guy [who] tried to stab somebody at 14 and the No. 1 is high energy and crazy as hell,” Graham said, referencing first Carson and then Trump.

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“How am I losing to these people?” he asked on MSNBC’s “Morning Joe.”  “Just look at Donald Trump’s foreign policy — what is it?”

“What is his game plan to destroy ISIL?” Graham asked, using an alternate acronym for the Islamic State in Iraq and Syria (ISIS). “Does anybody know? And he’s winning.”

Graham particularly took issue with Trump’s stance on Syria and Russia’s involvement in the ongoing civil war there.

Barack ObamaBarack Hussein ObamaSouth Carolina woman behind popular Obama slogan says she backs Steyer Sanders surges while Warren wanes Buttigieg: America 'united in mourning' Kobe Bryant's death MORE is not playing it well,” he said of the president’s handling of Russian leader Vladimir PutinVladimir Vladimirovich PutinSchiff shows clip of McCain in Trump impeachment trial The need for clear thinking about Russia German president expresses 'sorrow' for Holocaust, warns 'spirits of evil' are rising MORE and Syria.

“But to substitute Trump for Obama, what’s the difference?” Graham asked. “When it comes to Syria, what’s the difference between any of our own candidates and Barack Obama?”

“Dr. Carson is a fine man, but his foreign policy is hard for me to follow,” he added of the retired neurosurgeon.

Graham then compared Sen. Marco Rubio (R-Fla.) with Obama, saying each had a short Senate career before seeking the White House.

“[They are] young men in a hurry,” he quipped of the pair.

Graham then set his sights on the 2016 Democratic presidential field, arguing its candidates are no more electable than Carson or Trump.

“The No. 2 went to the Soviet Union on his honeymoon. I don’t think he ever came back,” he said of Sen. Bernier Sanders (I-Vt.)

“The leader felt that she was flat broke after her husband was president for eight years,” Graham added of Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonDershowitz: Bolton allegations would not constitute impeachable offense Hillicon Valley — Presented by Philip Morris International — NFL social media accounts hacked | Dem questions border chief over controversial Facebook group | Clinton says Zuckerberg has 'authoritarian' views Clinton on Sanders comments: 'I wasn't thinking about the election' MORE and former President Bill Clinton. “Maybe why they stole the china.”

The Republican establishment is struggling with a crop of presidential contenders who lack political experience but inspire fervor with voters.

Carson, Trump and former Hewlett-Packard CEO Carly Fiorina have all eclipsed more traditional candidates in support across multiple national polls. Graham, in the meantime, is fourth from last in the RealClearPolitics average of national polls with less than 1 percent support.