Not even the man who investigated the IRS over its Tea Party targeting is being spared from the scrutiny of Congress. 

In an unusual twist to the Capitol Hill probes into the tax agency, lawmakers have started to challenge the government watchdog who uncovered the wrongdoing -- questioning why he kept the findings from Congress at the height of an election year. They claimed Inspector General J. Russell George had an obligation under the law to do so, but ignored that. 

George, who until now was portrayed as the impartial official who blew the whistle on the IRS, was grilled by Republican Rep. Darrell Issa at Wednesday's House hearing for keeping the details from Congress for the better part of a year.