One of, if not the most, powerful international issue lobby is that of the pro-Israel crowd. Well-financed and politically powerful, the pro-Israel lobby is a major force on American foreign affairs that looks to continue America's military and fiscal support of the Jewish nation-state. The lobby has had recent policy success with the Trump administration moving the U.S. embassy in Israel from the internationally-recognized capital of Tel Aviv to Jerusalem, a move long advocated by some in the pro-Israel lobby. Notably however, JStreet, one of the larger pro-Israel groups opposed the move. The administration is very friendly with the Israeli Prime Minister Benjamin Netanyahu and has taken a hard line on Israel peace talks, barely talking to the Palestinians and ending all foreign aid to the West Bank and Gaza.

Even with the policy victories coming under a Republican president, the lobby still remained staunch Democratic contributors, giving more than $14.8 million in the 2018 midterms to mostly Democrats. This marked their third-biggest cycle ever and their biggest non-presidential cycle. [Read more Background]