It sounds terribly cynical of me, but I think that the political establishment in the United States will continue to stifle the actions of the IC when it concerns Israel; the American public was opposed to the Iraq war but that wasn't reflected in policy -- just like in many other matters.
The American political system is dominated by special interests and the progressive left operates with the smallest financial war chest and political influence.
America has learnt since Iraq, even conservatives think it was a mistake now. I genuinely believe America is a country that has to learn from previous mistakes to improve. Whether that's an indictment on them or an admiration of their learning from failure attitude, I don't know.
The US is changing politically, in that what was previously considered fringe is now becoming mainstream. The likes of Trump and AOC are quickly becoming poster children for the right and left respectively. A decade ago, neither of them would be taken seriously in the political space.
The idea of electoral money is also changing. More and more people are learning about PACs and more politicians are pledging to not accept any super PAC donations. Trump made a big deal out being allegedly "self-funded" which only increased his popularity. Comedians such as Stephen Colbert placing increased scrutiny is also helping matters.
The current battle in America is over social media. Both the progressives and far-right have made huge strides in capturing the masses and subscribing them to their beliefs. These followers are not susceptible to ad campaigns by Super PACs or negative television coverage of their favourite politician because they follow them on Twitter. Why do they want to listen to Fox News or CNN's opinion when their favourite politician will them what they think directly.
Sorry if this is a bit long but I hope you can see where I am coming from. The notion of money and interest groups controlling the middle ground politicians (centre-left and centre-right) in the US and therefore controlling the populace is dying. This is because those politicians are no where near as popular as the fringe politicians who use social media as their main medium.