they'd jud cornyn, the incumbent u.s. senator, is being challenged by a number of republicans, including congressman steve stockman, who had hoped to be a strong tea party challenger in part of this national effort in many states, missouri, and can a. and elsewhere to challenge incumbent republican candidates, but stockman's challenge doesn't seem to have gone very well. he's been hurt by stories about his own finances, questions about whether he's serious or not in this race. john cornyn is expected to win renation host: is cornyn expected to take the nomination without the possibility of a runoff here? guest: i think so. i do think that's going to happen even though there are a number of candidates. all he needs is 51%. the real question is not necessarily that he -- there won't be a runoff. there probably will not be a runoff. but what if stockman and others get 35% or 40% of the vote, what does that say about an incumbent and strongly conservative senate candidate senator in texas -- host: one of the leaders here on c