Fred Thompson will formally announce his candidacy for president next Thursday September 6th, via a webcast, political director Randy Enwright just told supporters on a conference call. Thompson will then head out on a "grass-roots tour" of Iowa, New Hampshire and South Carolina. He'll then do a second round of stumping the following week in Florida before returning to his hometown of Lawrenceburg, Tennessee, on the 15th. The Thompson campaign will file their papers with the FEC on the 6th, making his candidacy official and bringing an end to his "testing-the-waters" stage. On the night of the 6th, Thompson's campaign...