President Barack Obama made a joke with unfortunately bad timing Saturday, quipping that the Islamic State was no big deal compared to his birth certificate, only to have America hit by two separate explosions. While addressing a dinner held by the Congressional Black Caucus Foundation Saturday night, Obama joked about Republican presidential candidate Donald Trump’s recent declaration that Obama was, in fact, born in America. “I don’t know about you guys, but I am so relieved that the whole birther thing is over,” Obama said. “I mean, ISIL, North Korea, poverty, climate change, none of those things weighed on my...