MSNBC’s Joe Scarborough ridiculed Donald Trump and other Republicans for “freaking out” about the prospect of facing Vice President Kamala Harris instead of President Joe Biden. The 81-year-old president dropped his re-election bid Sunday under pressure following his weak debate performance and endorsed his vice president, and the “Morning Joe” host said that decision upended the GOP’s election strategy. He added it seemed to catch Trump off guard. “There is a shot of Capitol Hill where Washington is in shock this morning,” Scarborough said. “An earthquake, a tornado, a tsunami of change. I do…