The debate is a striking departure from longstanding practice on Capitol Hill, where for decades, lawmakers have approved huge amounts of military funding for Israel with few strings attached.
Now, as Israel battles Hamas in a conflict whose civilian death toll has soared, a growing number of Democrats are voicing worry about how American dollars will be used.
The disagreements among Democrats simmered behind closed doors on Capitol Hill and at the White House on Tuesday.
At the White House, Jake Sullivan, the national security adviser, huddled with roughly 20 Democratic senators who have raised concerns about how Israel might use U.S. assistance on the battlefield.
Later, at a private party lunch in the Capitol, several of the same Democrats argued to their colleagues that any aid package should increase humanitarian assistance to Gaza and ensure that Israel do more to avoid civilian casualties.
Persons:
Biden, Chuck Schumer, Jake Sullivan
Organizations:
Israel, Hamas, Capitol, simmered, White, Democratic
Locations:
Congress, Israel, New York, Gaza