Tough road for Democrats to keep the Senate

(CNN) – The 2014 midterms are less than one month away, and the negative TV ads are starting to loop and draw blood.

An analysis by the Wesleyan Media Project of Senate ads finds 55% of all those ads watched on TV are aiming below the belt.

Including six new ads from Democrats rolled out over the last week.

Democrats have been more eager than republicans to open up the opposition research file and use the airwaves to attack their opponents, according to the Wesleyan study.

But the map and the math nonetheless suggest President Obama's party still might need a miracle to avoid losing control of the Senate.

CNN's John King breaks it down in the video above.