Analysis : 21 Democrats voted to hold Holder in contempt ; 19 received NRA contributions . Democrats in competitive races may be trying to gain independence , expert says . Votes against party lines can be heartfelt but are mostly for political survival , expert says . NEW : He fights for folks here , '' the ad continued . Democrats launch campaign against House Republicans who voted for contempt .
Analysis : 21 Democrats voted to hold Holder in contempt ; 19 received NRA contributions . Democrats in competitive races may be trying to gain independence , expert says . Votes against party lines can be heartfelt but are mostly for political survival , expert says . NEW : Democrats launch campaign against House Republicans who voted for contempt .