Reagan was replaced by a Democrat when he chose not to run for a third term as governor.
Warner's problem if he wants to run for president is the same problem every other Virginian has: senator isn't a good way to launch your campaign, and neither is one short term as governor.
We need to repeal that stupid requirement so we can catch up to Ohio and New York. Make it one six year term.
True, it is possible Kilgore's victory would not hurt Warner, especially if his strength is based on something personal like Reagan's charisma was.