Democrats and Republicans have reached an agreement in principle over border security to fund the US government and avert another partial shutdown.
Lawmakers said the deal had been struck in a closed-door meeting in Washington.
No details have been released. Talks had stalled on the detention of undocumented migrants and funding for President Donald Trump’s border wall.
Speaking late on Monday, he did not say whether he would back the deal. “We’re building the wall anyway,” he stressed.
He told supporters in El Paso, Texas, that he had had no time to study the agreement, but stressed that he would “never sign a bill that forces the mass release of violent criminals”.