"These guys want to change the direction of the country".
Relations have been fraying between the Republican president and the Kochs recently.
Representatives for McConnell and Cornyn declined to comment, citing a practice of not discussing private meetings.
The Kochs' decision nonetheless sends a strong message to Republicans that there may be real consequences for those unwilling to oppose Trump.
"Their network is highly overrated, I have beaten them at every turn", Trump said.
"They want to protect their companies outside the United States from being taxed", Trump claimed, with the billionaire businessman framing himself as a champion of the people.
Donors also discussed the status of the network's work on a range of priorities for the constellation of Koch-aligned groups, including free speech on college campuses, supporting anti-poverty programs in communities, conducting new research in an effort to reduce recidivism rates, and more.
"It was very disappointing to see yesterday that they are not going to support Kevin Cramer in this all too important North Dakota (U.S.) Senate race", said Ronna McDaniel, the chair of the Republican Party.
Cramer is running to unseat Sen.
Heitkamp is one of 10 Senate Democrats who face re-election in November in states President Donald Trump won in 2016.
"Some people didn't come" to the summer gathering "because they were so pissed off", Deason said in an interview Sunday night. "I hadn't heard them do that before".
Trump has also escalated criticism in recent weeks of American companies that appear critical of his trade policies, including firing off threats at motorcycle manufacturers Harley Davidson.
But once Trump took office, he appeared to have made peace with the Koch network.
"What they have to do is shut up and get with the program, OK?" "If [he] doesn't step up to lead, that makes it hard to support him". Thus, the support for Heitkamp, who took on fellow Democrat Elizabeth Warren from MA and fought to roll back the regulatory measures in the Dodd-Frank regulatory apparatus.
A White House spokesman did not immediately respond to questions about when the billionaire president last bought groceries or anything else himself.
Asked if he would stand by the network if it began endorsing Democrats or if its activities cost the House GOP majority, Shepherd said: "Absolutely".
Former House Speaker Newt Gingrich, another Trump ally, took a darker view.
In remarks to reporters Sunday, Charles Koch - now exclusively at the helm after the retirement of his ailing brother David earlier this year - stopped short of blaming Trump personally for the political divisions.
Vice President Pence has strong ties to the Kochs from his time in Congress and as in governor.
Trump's backing has been crucial for some of the network's biggest legislative efforts, including overhauling the Department of Veterans Affairs. They have specifically criticized the White House over Trump's "protectionist" trade policies, which they fear could trigger a US recession in addition to a looming global trade war.
Trump, perhaps indirectly, alluded to the reasons why some Republicans voted for him two years ago and continue to support him while questioning some of his tactics and rhetoric.
Koch, 82, has been at the helm of his family's political organization since his younger brother, David, announced in June that he would be retiring from Koch Industries and politics for health reasons.
I'm sure that Charles Koch regards Trump as a vulgar halfwit, no matter how much money the president is shoveling into Koch's pocket.