One of them is on the fence over the Senate's ijit gun legislation and the other has a reputation for spinelessness. They need to be chivvied along in the proper direction:
Senator Joe Donnelly (D)
B33 Russell Senate Office Building
Washington, DC 20510
(202) 224-4814
Senator Dan Coats (R)
493 Russell Senate Office Building
Washington, DC 20510
(202) 224-5623
We probably can't fix what's wrong by voting but it'd be nice to not have to face it unarmed.
Update
3 days ago
