The Koch network of organizations –- funded by some 100,000 donors, with billionaires Charles and David Koch front and center -– had previously announced plans to spend between $300 million and $400 million in the 2017-18 cycle.
"We are more optimistic now about what we can accomplish than we've ever been," Charles Koch said. "I see us taking it to the next level."
In Colorado this weekend, hundreds of wealthy conservative donors have joined four governors, six senators, and five House members -– all of them Republicans -– to discuss policy and strategy under the thematic batter of "the courage to lead."
As for leadership in Washington, leaders of the Koch-backed political groups are expressing optimism about progress in some areas, particularly judicial appointments and the rollback of regulations.
But they are airing sharp differences with the Trump administration in other areas, including criminal justice reform, trade agreements, and drug enforcement.
"Hopefully we can change people's minds," Holden said.
The Koch-backed groups have stopped short of endorsing the Senate health care draft revealed this past week. They came out against the initial House proposal, but relented after changes were made to reflect conservatives' concerns.
"We're still hopeful on the health care front," Phillips said, adding that the bill "needs to get better" from a conservative perspective to earn his group's support.
He called it "flatly wrong" for Republicans to support continuing Medicaid expansions -– something moderate lawmakers are pushing for in the Senate.
"Their position is not the compassionate way to go, because this program is failing," he said.
As part of an effort to patch up relations, Vice President Mike Pence met privately Friday night with Charles Koch. Pence was in Colorado for unrelated political events and did not attend the donor gathering.