Jerry Moran in This Fight Is Our Fight, by Elizabeth Warren

On Government Reform: Supported Garland nomination until challenged in primary

When the Kochs heard about Moran's statement, they quickly brought down their well-financed fist: if Moran did not change his position instantly, they would find another Republican to run against him in the his next primary and launch an all-out offensive from the right. Koch-funded groups then flooded Moran's office with tens of thousands of e-mails and distributed flyers at one of his local town hall meetings.

Moran assessed the threat and realized that even his very safe Kansas seat could be at risk. With head-snapping speed, he reversed his position.