NPR's Linda Wertheimer reports from Tennessee on the state's changing political scene. When Republican Sen. Fred Thompson announced he would NOT seek another term, potential successors quickly announced their candidacy. Former Republican Tennessee Gov. Lamar Alexander is seeking the seat. But so is Republican Rep. Ed Bryant, who says he won't quit the race. If a Republican primary is held, the winner will still have to beat Democrat Rep. Bob Clement. What many thought would be a quiet election year in Tennessee is turning into one of the more interesting races in the country.