21.   But NATO is now so involved that to back off the air campaign would undermine the credibility of NATO and the United States, he said.

22.   But putting a mayoral appointee over the schools would make them even more vulnerable to political shifts, wipe out any semblance of independence and undermine academic credibility.

23.   But problems could undermine its credibility.

24.   But the committee is determined to air every grievance, every unsubstantiated recollection and every possible conspiracy charge that might undermine the credibility of the president and his wife.

25.   But the hold-up in IMF funding threatents to undermine the credibility of US finance officials trying to find a solution to the global financial crisis.

26.   Did that enhance the cause or undermine its credibility?

27.   Even the supporters of sanctions say the cycle of confrontation is undermining American credibility in China.

28.   Grammatical mistakes, clunky phrasing and carelessness can muddle your message and undermine your credibility.

29.   He said Microsoft executives told him that they did not wish to undermine the credibility of their witness.

30.   His aggressive ties to conservative groups have given fodder to critics who have tried to undermine his credibility.