Sure it did. What's more, she basically set up Obama to admit the video excuse was a total lie. And Romney still didn't sieze the chance.
You must have watched a different debate. Romney was losing in every poll and lost the election. The media didn't do anything to hurt him anymore than he hurt himself with his convention, going to Poland in the middle of the race, picking a very unpopular running mate, trotting out the same failed policies of tax relief for the rich, and chastising nearly 1/2 the country as people who were of a closed mind.