By David Morgan
WASHINGTON (Reuters) - U.S. Senate Republicans have reached a tentative budget deal that could allow tax reform legislation to eliminate as much as $1.5 trillion in revenues over 10 years through tax cuts, raising the odds that their planned tax overhaul would expand the federal deficit.
Two members of the Senate Budget Committee, Republicans Pat Toomey and Bob Corker, announced the formal agreement late on Tuesday, but their joint news release did not provide dollar figures for revenue reduction or tax cuts.
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The prospective tax cuts are part of closed-door talks among 12 Senate Budget Committee Republicans who are drafting a fiscal 2018 budget measure needed to help the 100-member Senate pass a tax overhaul with as few as 51 Republicans votes and prevent Democrats from blocking the legislation.
The U.S. economy is in a steady expansion and stock markets are rising. But the tax cuts being weighed by congressional Republicans, with encouragement from President Donald Trump, are on a scale normally reserved for times of economic hardship and intended to drive annual economic growth above 3 percent.
Trump campaigned last year on a promise of comprehensive tax reform. But Republicans have made little tangible progress toward that ambitious goal so far.
Toomey told reporters he is confident that Republicans will agree to a budget resolution that foresees a deficit in the first decade. He said, however, that talks have not settled definitively on $1.5 trillion.
"I'd like to see a bigger number," said Toomey, who argues that tax cuts would increase economic growth.
In their joint news release, Toomey and Corker said they agreed on a budget resolution that would use a standard analysis of the impact of the tax cuts on the deficit. Some Republicans like Toomey have pushed for a "dynamic" model, which tends to assume an increased economic stimulus effect from tax cuts, resulting in smaller projected increases to the deficit.
Senator John Thune, a member of the Senate Republican leadership team, said he expected the agreement to provide maximum flexibility to craft a tax overhaul capable of driving economic growth and ultimately raising worker wages.
But looming in the background is Washington's steady flow of red ink that adds every year to the $20 trillion national debt, a target of outrage not long ago for Republican "fiscal hawks." In recent weeks, some fiscal hawks have expressed a willingness to consider deficit financing for tax reform but many at levels well below $500 billion.
Toomey's comments suggest Senate Republicans may be looking to deficit spending as a way to cut taxes on businesses and individuals while avoiding hard decisions that would be needed to raise taxes elsewhere or eliminate popular tax breaks.
If adopted by Congress in a budget resolution, the $1.5 trillion figure would set a ceiling on how much revenue tax reform could eliminate over 10 years.
Analysts and Democrats have warned that higher deficits resulting from tax cuts would eventually overwhelm economic growth at a time when U.S. interest rates are set to rise.
Senate Finance Committee Chairman Orrin Hatch, whose panel would use the budget figure in crafting a tax reform bill, told reporters he was not sure that revenue losses of $1.5 trillion were needed for tax reform.
Senator Ron Wyden, the Senate Finance Committee's top Democrat, dismissed the development as a distraction from the more important question of how Republican tax reform would ultimately benefit the wealthy.
"It looks to me like yet another trial balloon," Wyden said.
Republicans have been unable to agree on how to pay for tax cuts and other proposed tax changes, aside from arguing that some lost revenue would be clawed back from the buoyant economic growth they believe tax reform will deliver.
"There's no way you're going to be able to do tax cuts that pay for themselves," said Louisiana Senator John Kennedy, another budget committee Republican. "But I think most people would concede that cutting taxes does stimulate the economy."
(Reporting by David Morgan; Additional reporting by Amanda Becker; editing by Kevin Drawbaugh and Lisa Shumaker)