Minority Whip Roy Blunt , R-Mo., said he expects about 100 Republicans to sign the petition by Rep. Thelma Drake , R-Va., which seeks to bring to the House floor border enforcement legislation introduced by Rep. Heath Shuler , D-N.C. Shuler’s bill has 141 cosponsors — 93 Republicans and 48 Democrats. But it is not clear how many Democrats will sign the discharge petition. The petition represents a direct challenge to their party’s leaders, who have not embraced Shuler’s bill.