Sen. Tom CottonTom CottonOvernight Cybersecurity: White House adviser ditches cyber panel over 'fake news' | Trump cyber order 'close' | GOP senator pushes for clean renewal of foreign intel law Overnight Tech: Dem wants to see FCC chief's net neutrality plans | New agency panel on telecom diversity | Trump calls NASA astronaut GOP senator pushes for clean reauthorization of foreign intel law MORE (R-Ark.) says he'd rather see Donald TrumpDonald TrumpOvernight Energy: Trump set to sign offshore drilling order Bush ethics lawyer: Trump should strip Flynn of military title Dems might begin again with Kamala Harris and California MORE in charge of America's military than Hillary ClintonHillary Rodham ClintonOvernight Cybersecurity: Anticipation builds for Trump cyber order | House panel refers Clinton IT contractor for prosecution | Pentagon warned Flynn about foreign payments Trump’s foreign policy of more is about money Meghan McCain: Obama 'a dirty capitalist like the rest of us' MORE.

“I think he could be commander in chief,” he told host Willie Geist on MSNBC’s “Morning Joe."

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“He’s one of our leading candidates, and, as I said, any of our candidates right now would be a better commander in chief, they’d be a more serious leader for our country than Hillary Clinton is,” he added.

“[Clinton] has not only been the architect for Barack ObamaBarack ObamaTrump must challenge Iran's ongoing human rights abuses Overnight Cybersecurity: Anticipation builds for Trump cyber order | House panel refers Clinton IT contractor for prosecution | Pentagon warned Flynn about foreign payments Ex-Obama official mulls run against Republican who negotiated healthcare changes MORE’s foreign policy which has left the world aflame, but also shown such a casual disregard for the handling of sensitive national security secrets that I believe she’s disqualified from being commander in chief.”

Cotton said any Republican would make a better president than Clinton, the Democratic front-runner.

“There are more days ahead of us than there are behind us, so we don’t know who our nominee will be,” he said. "I know whoever that nominee is, though, will be more qualified to keep Americans safe than Hillary Clinton.

“She likes to portray herself as a safe, steady, experienced hand who’s ready to answer the 3 a.m. phone call. She got one of those once. It was called Benghazi. She slept through it. Four Americans died.”

Cotton slammed the ongoing feud between Trump and GOP presidential rival Ted CruzTed CruzNet neutrality fight descends into trench warfare Secret Service: No guns at Trump NRA speech Cruz: Breaking up 9th Circuit Court ‘a possibility’ MORE over their wives, calling it a distraction from serious security issues.

“I would just say that I think Melania [Trump] and Heidi [Cruz] are both very successful, accomplished women,” he said.

“We should respect them as capable advocates for their husbands’ campaigns and leave it at that and then we can get serious. Americans want to know what their elected leaders are going to do to keep them safe.”

Cotton on Monday attended a meeting between Trump and various GOP lawmakers past and present in Washington, D.C. He has not yet endorsed a Republican presidential contender.