Collins has accepted more than $8.3 million from corporate PACs throughout her career.

Sen. Ted Cruz, who is the subject of an FEC complaint, is prominently featured.

'Twenty years ago, when I started in politics, obviously, our community was being used as a punching bag to juice Republican turnout,' the End Citizens United president recalled, 'And we're seeing that history repeat itself right now.'

Court documents show Fox News executives pushing for the network to help Republican Party candidates win elections in multiple cycles.

End Citizens United wants Republicans who took money from Santos and his PAC to give the funds to charity immediately.

Outside groups — often funded by undisclosed sources — supporting Republican House and Senate candidates significantly outspent groups supporting Democrats in close races.