Senators DO admit that it's constant campaigning for most of them (with the exception of those few who've held a seat for decades, like the late Ted Kennedy). The whole principle of a bicameral legislature was that one represented the masses the other represented the...for lack of a better expression, intellectual elite. The House is constantly campaigning, not looking out for the good of the country in all cases (but still representing the voice of the people). The Senate (used to) represent those whose aims did not depend as much on a vote or pleasing the masses who usually aren't the most educated or knowledgeable on the subject. Since a bill has to pass both legislatures, the interests of the nation and its people should both get proper attention.

Nowadays, Senators don't have that luxury. It's a sad state Congress is in. If you wanna blame nothing getting done on something, blame it on partisanship, which is hurting this nation greatly. If it were up to me, there would be no political parties.