The ad slams the Democratic leader for referring to employee bonuses that some companies gave in the wake of the tax overhaul as “crumbs."
In a video message, the House speaker credited the Koch network for being “such a critical part of our historic success in 2017."
The group sees the campaign as key to holding the Republican congressional majorities in the midterm elections.
The GOP latched onto the senator saying lowering middle-class taxes was good, and conservative media has portrayed him as supporting other components of the tax measure.
Vulnerable Democrats are feeling very little pressure to back the GOP’s ever-morphing, broadly unpopular legislation.
The senator had played a pivotal role in both fundraising and messaging.
As GOP lawmakers prepare to pass tax plans that expand the deficit, the trio blasts “a broken budget process” that could upend military planning.
If the IRS fails “and people are looking for fault, it will be the fault of the Congress … I am blaming Congress,” John Koskinen said.
Schumer's comments came as Democrats coalesced around a message attacking the GOP's tax plans, one that highlighted the bill's benefits to businesses and high-income taxpayers.
The meeting will come as the president tries to gain support for a tax cut plan.