With MAGA collapsing into a circular firing squad as its leaders seek to apportion blame for the failures and chaos wrought by President Donald Trump, Vox contributor Zack Beauchamp has a novel metaphor for their attempts to wriggle out of responsibility for their own movement’s actions: “It’s a real-life version of the famous sketch on Tim Robinson’s show I Think You Should Leave, where a hot-dog-shaped car crashes into a storefront and a man i…