Democrats in the House and Senate are discussing how to create conditions for future military aid to Israel, according to two party members, one in each chamber.

The debate among mainstream Democrats is preliminary, and it’s unclear if the conversations will evolve into congressional action. But White House officials are aware of the discussions, the Senate Democrat said, and have been warned that administration allies could openly push for conditions in the near future.

The senator added that Capitol Hill discussions about restricting humanitarian aid going into Gaza have prompted Democrats to hold similar debates on conditioning military aid to Israel. “That’s a conversation I never heard significantly before — until now,” said the lawmaker. The House member, who like others was granted anonymity to detail sensitive discussions, said Democrats are “moving toward” pushing for those conditions on future support.

Sen. Bernie Sanders (I-Vt.) hosted a lunch on Wednesday for Senate Democrats about the Israel-Hamas war, four people knowledgeable of the gathering said. Shibley Telhami, the Anwar Sadat professor for peace and development at the University of Maryland, spoke to the lawmakers on the issues and confirmed the meeting happened. Three other people said that Telhami was a guest alongside The New York Times’ Tom Friedman and former Middle East peace negotiator Dennis Ross, neither of whom immediately responded to requests for comment.