Hours after Pennsylvania State Police arrested a 21-year-old Idaho man for allegedly firing a semi-automatic rifle at the White House, the top student official for the College Republicans at the University of Texas tweeted that the idea of assassinating President Obama was “tempting.” At 2:29 p.m. ET, UT’s Lauren E. Pierce wrote: “Y’all as tempting as it may be, don’t shoot Obama. We need him to go down in history as the WORST president we’ve EVER had! #2012.” Pierce, the president of the College Republicans at UT Austin, told ABC News the comment was a “joke” and that the “whole...