MSNBC host Joe Scarborough on Thursday criticized Hillary ClintonHillary Diane Rodham ClintonQueer Marine veteran launches House bid after incumbent California Rep. Susan Davis announces retirement Poll: Trump neck and neck with top 2020 Democrats in Florida Former immigration judge fined, temporarily banned from federal service for promoting Clinton policies MORE's campaign for its defense of the Clinton Foundation after the Democratic presidential nominee's spokesman argued the foundation is needed to fight the AIDS crisis.

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Clinton spokesman Brian Fallon defended the foundation and its work on "Morning Joe," saying more than half of the people in the world receiving AIDS drugs got them through the Clinton Foundation.

"So, no, the Clinton Foundation will not be completely shuttering its work even if Clinton wins the presidency — and for good reason. They want to continue this work," Fallon added.

"If any American voter is troubled by the idea that the Clintons want to keep working to solve the AIDS crisis on the side while Hillary Clinton is president, then don't vote for her."

"That is so pathetic. You all are not really that pathetic, are you?" the "Morning Joe" host shot back.

"You're going to actually say that if Bill ClintonWilliam (Bill) Jefferson ClintonMost voters say there is too much turnover in Trump administration RNC spokeswoman on 2020 GOP primary cancellations: 'This is not abnormal' Booker dismisses early surveys: 'If you're polling ahead right now, you should worry' MORE doesn't have the opportunity to shake down billionaires, that AIDS will not be cured?" he asked.

Scarborough went on to mock Fallon's defense.

"If we're keeping score at home, Barack ObamaBarack Hussein ObamaMost voters say there is too much turnover in Trump administration Trump's 'soldier of fortune' foreign policy Warren picks up key endorsement from Iowa state treasurer MORE is Moses and has the ability to stop the tides from rising in our time?" he said.

"And Bill Clinton, shaking down billionaires in Kazakhstan, while doing deals on the side and getting paid $550,000 for a one-hour speech, that's our only path forward to curing AIDS?"

"You're not really that pathetic, are you? Because if that's the best line of attack you have, you need to go back to middle school and start all over again."