When we elect representatives, we expect them to be held accountable to two things: the people they represent, and the laws they are subject to.
Your elected officials are in office to represent you, and you should have the power to vote them out if they no longer act in the best interests of your district. Despite this fundamental principle of self-government, there are institutional barriers designed to keep politicians in office, regardless of their job performance. Holding lawmakers accountable means removing the partisan or issue-based structures that replace the role of constituent voices in elections.
This can be accomplished through a variety of reform proposals that give American citizens the power of accountability.