Some lawmakers are rethinking their support of controversial anti-piracy bills that led to some websites shutting down in protest.

The protest was in response to the Stop Online Piracy Act (SOPA) bill, a piece of proposed legislation that is working its way through Congress. A Senate committee approved a similar bill in May called the Protect IP Act (PIPA), which is now pending before the full Senate.

The protest seemed to change the minds of lawmakers, including those that had strongly backed the bills in the past.

"We can find a solution that will protect lawful content. But this bill is flawed & that's why I'm withdrawing my support. #SOPA #PIPA," Republican Sen. Roy Blunt wrote on his official Twitter page.

Republican Sen. Marco Rubio of Florida, who was an initial co-sponsor of PIPA, reversed his position.