Americans were still waking up to the worst mass shooting in U.S. history Sunday when Donald Trump popped up on Twitter, boasting about his call to ban Muslims from entering the U.S. and calling on President Obama to resign.
He tweeted: "Is President Obama going to finally mention the words radical Islamic terrorism? If he doesn't he should immediately resign in disgrace!"
"In his remarks today," Trump said later Sunday in a statement, "President Obama disgracefully refused to even say the words 'Radical Islam.' For that reason alone, he should step down."