DALLAS - The abrupt resignation of a University of Texas regent overseeing investments for the state's Permanent University Fund has become an issue in the political battle between Gov. Rick Perry and his presumed 2010 primary challenger, U.S. Sen. Kay Bailey Hutchison.

Robert Rowling, chairman of the University of Texas Investment Management Co., reacted to questioning from lawmakers about $3.4 million in bonuses to key executives last week by declaring he was quitting as UTIMCO chairman and as a UT regent.

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