By Ramsey Cox
The motion to end debate on proceeding to the bill would require 60 votes — that vote is likely to come next week.
Some Republicans have complained that the legislation would provide amnesty for illegal residents before strengthening border enforcement.
Sens. Marco Rubio (R-Fla.), John McCain (R-Ariz.), Lindsey Graham (R-S.C.), Jeff Flake (R-Ariz.), Charles Schumer (D-N.Y.), Dick Durbin (D-Ill.), Bob Menendez (D-N.J.) and Michael Bennet (D-Co.) comprise the Gang of Eight.