CBS secured hidden camerage footage of National Republican Campaign Committee headquarters.
Chaffetz's challenger highlights expenses for hotels and babysitting.
Anthony Brown lost the 2014 governor's race to a Republican.
Shuster's relationship with an airline lobbyist raised ethical questions.
State Sen. Jamie Raskin beat out David Trone, who set records for self-funding.
Fattah faced a multicount federal indictment.
Art Halvorson will face Rep. Shuster in Tuesday's primary.
Tuesday's races test if incumbents can win under ethical clouds and the power of self-funding.
Cristina Marcos 04/21/16 05:01 PM EDT
Rep. David Young wants his pay to be withheld until the chamber passes a budget.
Graham was considered one of the most vulnerable Democrats this cycle.