Congressional support for controversial online piracy legislation eroded dramatically on Wednesday in the face of an unprecedented online protest supported by tech titans such as Google, Wikipedia and Facebook. Several key senators withdrew their support from the Senate's Protect IP Act (PIPA), including Tea Party favorite Sen. Marco Rubio (R-Fla.) and Sen. Roy Blunt (R-Mo.), an elected member of his party's leadership. Sen. John Cornyn (R-Texas), who leads the Senate GOP's campaign team, said the legislation should be put on hold, while Sen. Orrin Hatch (R-Utah), a sponsor and the ranking member of the Senate Finance Committee, retreated from the...