Well, he did it again. I’m talking about Donald Trump indulging his penchant for taking a wrecking ball to the Republican Party. In this case it was the Pennsylvania Republican Party that Trump took apart. At stake was the U.S. Senate seat being vacated by the retiring Pat Toomey. The favorite wasDavid McCormick, a native Pennsylvanian and West Point grad who had solid senatorial credentials. Given the GOP wave that’s expected this November, McCormick looked like a safe pick to keep the seat in the general election. But then Trump got involved. The Donald endorsed a guy by the name of Dr. Oz, …