The House of Representatives should be the primary focus for the efforts of a reform party or a reform movement. All House Representatives are elected every two years, unlike Senators who are elected every six years with approximately one-third of the Senate elected every two years. The goal is to elect a majority of reformers in 2018.
It is imperative that reformers win a majority in the House of Representatives because the majority party elects the Speaker Of The House. The Speaker is the person who basically decides which pieces of legislation go up for a vote. If reformers can win the House of Representatives they can control the legislative agenda.