What’s a little scaremongering among Republicans? Donald “91 Counts” Trump is feeling especially vulnerable these days. For good reason. He sees his “empire” under threat on Monday of being seized to cover his half-billion-dollar bond in the New York financial fraud case. If he does not win the presidency, conviction in his other four pending cases could mean he spends the rest of his days in prison. The harshest cut of all is the damage to an ego so fragile it requires constant media and fan attention to keep from melting down. So he and his campaign are in damage-control mode after his big mouth spit out words to the effect of his threatening Social Security and Medicare if reelected. In Trumpian “I know what you are, but what am I?” fashion, Trump issued a panicked “Truth” accusing Democrats of being the party threatening the safety net. Big “tell,” Greg Sargent observes: Plainly, what triggered this rage-rant was the news that a group of House Republicans has proposed a budget that would raise the retirement age for Social Security and restructure Medicare along lines that Paul Ryan–esque Republicans have long sought. Democrats have seized on this to bludgeon the GOP for threatening to cut the program. Trump and his advisers know how big a problem this is for them. After Trump recently opened the door to Social Security and Medicare cuts, his campaign rushed to clean up his remarks. His eruption Thursday was clearly an effort to stanch the bleeding, now that House Republicans have opened…