Lawmakers who met with President Trump on Tuesday to discuss immigration say they have narrowed the scope of a potential deal, and said that work has left them optimistic that a bill can be written and passed.

“I thought it was a very productive meeting in terms of setting up the parameters of the negotiations, the parameters of the discussions,” said Sen. Cory Gardner, R-Colo, after the meeting. “I leave the meeting under the impression the four parameters of the negotiations have been agreed to.”