A super PAC supporting celebrity billionaire Donald Trump has made its first television buy, spending $1 million on a spot encouraging the Republican Party to unify behind him, -snip- Great America PAC, which was formed and officially registered with the Federal Election Commission on Feb. 1, spent $25,000 on radio ads in Iowa in January, but this week's buy marks the group's most significant campaign expenditure to date. The 30-second spot will air ahead of April 26 primaries in Delaware, Pennsylvania, Rhode Island and Connecticut. -snip-One of Trump's favorite selling points on the campaign trail is that he's self-funding his...