A slice of corporate America thinks tea partyers have overstayed their welcome in Washington and should be shown the door in next year's congressional elections.
In what could be a sign of challenges to come across the country, two U.S. House races in Michigan mark a turnabout from several years of widely heralded contests in which right-flank candidates have tried sometimes successfully to unseat Republican incumbents they perceive as not being conservative enough.
In the Michigan races, longtime Republican businessmen are taking on two House incumbents hard line conservative Reps. Justin Amash and Kerry Bentivolio in GOP primaries. The 16-day partial government shutdown and the threatened national default are bringing to a head a lot of pent-up frustration over GOP insurgents roughing up the business community's agenda.
(Read more: Tea party and big business)