The Confederate (Constitution) contained another great idea that would certainly upgrade our own Constitution: it limited the president to a single term of six years. The lousy second-term president is one of the great curses of American history. When loyalists chant “four more years” at party conventions, it’s almost like they’re hexing their subjects. From George Washington and Thomas Jefferson to Bill Clinton and George W. Bush, the disappointing presidential encore has become a dismal tradition. Given this pattern, even the most loyal Obama supporter must wonder whether re-election in 2012 would be worth it.