He does two things for Rudy. He’s a help in Missouri which is a tough Feb. 5 state and he is certainly a solid conservative on everything from social issues to the economy to the war. I’m always leery of attributing too much to individual endorsements unless they are extraordinary but as part of a theme — mainstream conservatives get on the Rudy bus, for example — they have some utility. And to the extent they encourage other more prominent figures to get on board it helps.
UPDATE: And some think there is something else at play- swing state Republicans looking strategically at who at the top of the ticket can help in Congressional and Senate races. Missouri and Minnesota would seem to fit that bill.