Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE’s campaign manager on Wednesday struggled to answer questions about his boss's proposals to handle the civil war in Syria in an interview on “Morning Joe.”

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Asked what Clinton regrets from her time as secretary of State regarding the Syrian crisis, Robby Mook defended her as being “well-regarded” for her leadership during that time.

“She, in contrast to Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE, has released a clear and decisive plan to defeat ISIS,” Mook said.

Pressed further for specifics about Clinton’s thoughts on Syria, Mook repeatedly dodged and referred questions to Clinton herself.

“Again, I think you’re going to have to ask her that question. That’s a matter of policy. I’m going to leave it to her to determine that,” Mook said in response to a question about the difficulty in delivering humanitarian aid to besieged Syrian cities.

“We love you buddy, but what are you here for?” Joe Scarborough, the show’s host, interjected.

Scarborough likened Mook’s inability to answer the questions to Libertarian nominee Gary Johnson Gary Earl JohnsonWhat the numbers say about Trump's chances at reelection Presidential race tightens in Minnesota as Trump plows resources into state The Hill's Campaign Report: Biden condemns violence, blames Trump for fomenting it l Bitter Mass. primaries reach the end l Super PAC spending set to explode MORE briefly forgetting what Aleppo is during an appearance on the show earlier this month.

“Well you’ve been saying that Donald Trump won’t tell us what the policy is, but here you are not telling us what the policy is,” added anchor Willie Geist.