Senate Republicans thought they were safe with a majority and a Republican in the White House.
But one of the loudest voices in the MAGA movement just told them they are dead wrong.
And Steve Bannon dropped a warning so brutal it should have every GOP senator sweating through their suit jacket.
Bannon Goes After Thune by Name
On his War Room podcast, Bannon went straight at Senate Majority Leader John Thune (R-SD), accusing him of delivering what Bannon called “Senate cuck talk” after Thune made public remarks defending the reauthorization of FISA, the Foreign Intelligence Surveillance Act.
Thune had told colleagues that national security had to come first, invoking what he described as a Senate saying: “If you don’t get national security right, the rest is just conversation.”
Bannon wasn’t buying it for a second.
“Do not sit there and get all puffed up and tell me that you’re so worried about national security!” Bannon fired back after watching the clip of Thune. “You’re not worried about anything but your Wall Street donors and your big corporate donors and the tech broligarch donors.”
That’s the core of Bannon’s argument. Thune and the Senate Republican leadership, in Bannon’s telling, are using the language of national security as cover while they serve the donor class that funds their campaigns and keeps them comfortable in Washington, DC.
FISA Is the Flashpoint
FISA has been a deeply contested issue inside the America First movement for years, and for good reason. The same surveillance apparatus that politicians like Thune defend as a counterterrorism tool has been used to spy on American citizens without warrants, including, according to documented findings, on individuals connected to Donald Trump’s 2016 campaign. Opposing the warrantless surveillance powers baked into FISA Section 702 isn’t paranoia. It’s a principled stand for civil liberties that a growing number of conservatives hold.
Bannon took Thune’s defense of FISA reauthorization as proof that Senate Republicans are more interested in protecting the intelligence community’s existing power structure than in fighting for the priorities of the people who elected them.
And Bannon didn’t stop with FISA. He accused Thune of “kowtowing” to Wall Street donors while doing nothing serious about what he called the “invasion” of illegal migrants crossing the southern border.
The Donors Own the Senate
The sharpest line Bannon delivered came later in the broadcast, and it’s worth reading slowly.
“They’d rather cross Trump than cross their donors,” Bannon said of Senate Republicans. “They’re preparing to take on the president because their donors say, ‘we got your back.'”
That’s not a small accusation. Bannon is saying flatly that Republican senators have made a calculation: their financial backers matter more than the president who put them in power and more than the voters who sent them to Washington, DC in the first place.
He pushed the point further, telling President Trump directly what he believed needed to happen. “President Trump, you ought to tell him, hey, how about this? I’m going to work against it. It doesn’t matter that we control the Senate. You’re not doing anything. In fact, you’re working counter to the MAGA project. You’re working counter to the American people. You’re working counter to our sovereignty.”
And then he turned Thune’s own words against him. “John Thune’s going to sit there and go, we have a saying up here, you know, we have a saying up here and the saying is, if you don’t get national security right, the rest of it’s just conversation. Well, you’re not getting national security right.”
A Party at War With Itself Before the Midterms
This isn’t just Bannon venting. He’s been sounding the alarm about the 2026 midterms for weeks, and the picture he paints is ugly.
Bannon has warned repeatedly that Republicans are going to lose the Senate in the fall. His argument is that the grassroots energy that powered Trump’s 2024 landslide isn’t going to show up for candidates who govern like establishment Republicans once they get to Washington, DC. Nobody in the base is going to knock on doors in the summer heat for senators who turn around and serve the donor class the moment the cameras are off.
“No grassroots leader, none of the grassroots phalanx, the hoplites — nobody’s excited about going door to door and doing voter engagement,” Bannon said. “The old way of putting a couple hundred million dollars in and buying TV ads on Fox and CNN doesn’t work anymore. That’s old school. Does not work. There’s been a new day, and the Senate’s got to understand that, or we’re going to lose the Senate.”
But the Senate, at least in Bannon’s reading, isn’t listening. The consultants are still running the same playbook. The donors are still writing the checks. And the grassroots is watching all of it and getting angrier by the week.
What Happens Next
Bannon’s broadside against Thune and Senate Republicans isn’t coming out of nowhere. The tension between the populist MAGA wing and the donor-funded establishment wing of the Republican Party has been building since Trump first came down the escalator in 2015, and it never fully resolved.
Trump won twice, but the Senate’s old guard never fully converted. They tolerated the MAGA agenda when it was convenient and quietly worked around it when it wasn’t. The donors who fund their campaigns have never been comfortable with the America First trade and immigration positions, and those donors still have enormous leverage over the senators who depend on their money.
Bannon’s warning is essentially this: the base knows it, the grassroots knows it, and if Senate Republicans keep choosing their donors over their voters, the 2026 midterms are going to be a disaster. Not because Democrats are strong, but because MAGA voters will simply stay home rather than reward a Senate that has spent the last two years working counter to everything they voted for.
Whether Thune and his colleagues take that warning seriously is another question entirely. So far, the signals out of Washington, DC suggest they won’t.
Sources: Mediaite, Bannon’s WarRoom podcast, June 2026