What happened to McCain?

Good evening. Did that 2008 presidential run of his completely toast his brain? Was being exposed to Palin the cause? I really used to like this guy but lately his elevator doesn't seem to go to the top anymore.
John McCain Says Obama's Policies 'Directly Responsible' for Orlando

Quote:

Republican Sen. John McCain blamed President Barack Obama for the deadly shooting in Orlando that killed 49 clubgoers. He said said the president is "directly responsible for it because" of his "utter failures" in Iraq. "Barack Obama is directly responsible for it because when he pulled everybody out of Iraq, al Qaeda went to Syria and became ISIS and ISIS is what it is today thanks to Barack Obama's failures," McCain told reporters on Capitol Hill, according to audio obtained by NBC News.

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