Updated: 11:08 a.m.

Sen. John Cornyn (Texas) announced Friday that he will oppose the nomination of Sonia Sotomayor to the Supreme Court, becoming the latest GOP leader and second Republican on the Judiciary Committee to do so.

Democrats had hoped the National Republican Senatorial Committee chairman would bow to pressure from Latinos in his home state and nationally and back Sotomayor.

Although her confirmation is not in doubt, Democrats hoped that picking up Cornyn could have lured other Republicans to make the already bipartisan vote that much stronger.

Cornyn joins Minority Leader Mitch McConnell (R-Ky.), Minority Whip Jon Kyl (R-Ariz.) and Republican Policy Committee Chairman John Thune (S.D.) in opposing Sotomayor’s nomination. Kyl is also a member of the Judiciary Committee.

A number of Republicans have already endorsed Sotomayor, including Sen. Lindsey Graham (S.C.), also a Judiciary member. Graham has come under fire from conservatives for his support.

The committee is expected to vote out Sotomayor’s nomination Tuesday, and floor debate could begin by the end of next week at the earliest.