Senator Claire McCaskill is one of three U.S. Senators who are urging President Obama to remove NASA's Inspector General, reports Bloomberg News.
"If we are to strengthen our oversight system, we must set the tone at the top and hold inspectors general accountable for improper conduct and just plain not doing their jobs," reads the letter from Sens. Jay Rockefeller, Claire McCaskill and Charles Grassley.
The Senators accuse Robert Cobb of "stifling" investigations and retaliating against whistleblowers.