Feverishly coming up with rules that nobody has ever heard of before

At the Ace of Spades blog, Oregon Muse writes,

"So with the announcement of the retirement of Supreme Court Justice Kennedy, the progtards are feverishly coming up with rules that nobody has ever heard of before, but nevertheless they claim Trump is bound by. The first one out of the gate was that Trump couldn't appoint Kennedy's successor until Mueller's ongoing investigation cleared him of collusion with the Russians. It's doubtful that that this rule ever existed before three or four days ago, but you have to admire the brazen presumption of guilt here. And now Chuck U. Schumer is claiming that Trump can’t appoint a Supreme Court Justice in an Election Year. Even though Justice Kagan was nominated by Obama and confirmed just 3 months before the 2010 midterms, you have to wonder what other long-standing rules the left is going to suddenly invent out of whole cloth to obstruct the president. Get ready for 'Since Kennedy was a moderate, he has to be replaced with another moderate'. Or maybe 'The president can't nominate any judge in the summer or in months with the letter 'r'. Just watch. The craziness has just begun. And then, years from now, when a Democrat gets elected president, and a SCOTUS vacancy opens up, all of these rules will mysteriously disappear, never to be heard from again."