SMART ALECK IN CHIEF. Why is the 44th president of the United States bad-mouthing Mitch McConnell, John Boehner, Sarah Palin, Rush Limbaugh, bankers, mine operators, insurers, Glenn Beck, the tea party, the Supreme Court, and now British Petroleum (BP)? Among other reasons, it’s what Barack Obama likes to do.

And it’s conduct unbecoming a president.

MORE: Breaking with presidential punch line tradition for the second consecutive year, Obama dropped zinger after zinger on his opponents and allies alike at the annual White House Correspondents' Association dinner. And except for a mild joke pegged to his falling approval ratings, Obama mostly spared Obama.

With Obama, it’s not about humor; it’s about getting even.