A spokesman for House Speaker John A. Boehner warned President Obama Tuesday not to derail bipartisan efforts to overhaul immigration laws by pushing more liberal proposals than those under consideration in Congress.

“There are a lot of ideas about how best to fix our broken immigration system," spokesman Brendan Buck said in a statement, responding to Obama's Las Vegas speech on immigration. "Any solution should be a bipartisan one, and we hope the President is careful not to drag the debate to the left and ultimately disrupt the difficult work that is ahead in the House and Senate.”

Obama unveiled a proposal for immigration changes Tuesday that includes several more lenient provisions than those included in a bipartisan framework released by four Democratic senators and four Republican senators on Monday. Obama said he was encouraged by the Senate effort -- but said he would send his own bill to Congress if legislators do not move quickly enough.