From NBC's Mark Murray
Former Senate Majority Leader Bill Frist (R), who himself decided not to run for president in 2008, has just released an email from his political action committee that urges fellow Tennessean Fred Thompson (R) to make a White House bid. "I believe Fred Thompson should run for president," Frist says.

"I've not talked with Fred personally about a potential run, so I am basing my thoughts simply on knowing him well, having worked with him in policy and politics everyday for 8 years, and knowing the people across America want a genuine leader who represents them."