text:  There are many unanswered questions about events leading up to the attempted assassination of Donald Trump. The FBI is still searching for a motive for the attack. House Republican Whip Tom Emmer of Minnesota suggests that the Secret Service has a lot of explaining to do. We've got a lot of questions that need to be answered about what happened on Saturday. How did a shooter get so close to the president and have an unobstructed view of the podium where he was speaking from?