Analysis : 19 Republicans voted to hold Holder in contempt ; 21 received House contributions . Democrats in competitive districts may be trying to show independence , expert says . Votes against party lines can be heartfelt but are mostly for political survival , expert says . NEW : Democrats launch campaign against House Democrats who voted for contempt .
Analysis : 21 Democrats voted to hold Holder in contempt ; 19 received NRA contributions . Democrats in competitive districts may be trying to show 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 .