New Delhi, July 18 -- WASHINGTON - Katherine Clark had accepted more than $1.4 million from the American Israel Public Affairs Committee over the years. Last week, her donor portal went dark.

Clark, the House Minority Whip and one of the most senior Democrats in Congress, was among 15 AIPAC-endorsed lawmakers who found their fundraising access suspended after voting in favor of an amendment that would have stripped $3.3 billion in annual military aid to Israel. The July 15 vote - which failed 314-104 but drew 103 Democratic yes votes - cracked open a fault line that AIPAC spent decades and hundreds of millions of dollars trying to prevent.

"I will be voting yes, not because I agree with the entirety of the amendment, or the GOP's cynica...