Obama warns against clash on immigration President Barack Obama warned Republicans against letting conflict over his action on immigration become a "deal breaker" on other issues as political rancour grew on Friday. The president took his sales pitch on the road, using a fiery speech in Las Vegas to tell Republican opponents not to take drastic measures like a government shutdown as they continued to accuse him of abusing his authority. Mr Obama's speech came the day after he unveiled a sweeping order that uses the powers of his office to remove the threat of deportation hanging over nearly 5m unauthorised immigrants. Washington should not let disagreement over one issue be a deal breaker on every issue. That's not how a democracy works," he said on Friday. Congress certainly should not shut down the government again over this, because Americans are tired of gridlock. We are ready to move forward. The ire sparked by the president's move threatens to kill off any chance of legislative co-operation next year between the White House and a new Republican-controlled Congress on issues such as trade, tax reform and energy policy. On Friday, John Boehner, speaker of the House of Representatives, accused Mr Obama of "damaging the presidency." Separately, House Republicans filed a long-promised lawsuit against the White House over its signature healthcare reforms, further sharpening political tensions. In Las Vegas Mr Obama repeated his message from a Thursday evening address that Republicans should "pass a bill" on immigration reform - a phrase the audience at a high school took up as a chant. The day I sign that bill into law then the actions I've taken will no longer be necessary. And I'll give everyone credit," he said. He was, however, interrupted by a heckler, a reminder that immigration activists did not get everything they wanted from his executive action, which will still leave more than half of the US's 11m unauthorised immigrants at risk of deportation. "That's right, not everyone will qualify under this provision," the president said. That's the truth. That's why we're still going to have to pass a bill.