In a sign of further discontent among House Republicans, Roll Call is reporting that Congressman John Shadegg (R-AZ) will be announcing his retirement.

Shadegg ran for House Majority Leader in early 2006 and then for Minority Whip later that year, after the Republicans lost control of Congress. The abrupt departure of such a vocal and ambitious conservative, absent any compelling personal reason, won't exactly be a cause for optimism among party activists.