A key Democratic committee chairman on Wednesday said that House Democrats aren't going to offer up a revenue source to pay for an infrastructure package until they have a deal with the White House.

"I think it's really important that we not volunteer a revenue stream until the administration reaches an agreement with us," House Ways and Means Committee Chairman Richard Neal Richard Edmund NealRep. Cedric Richmond set to join House Ways and Means Committee Coons beats back progressive Senate primary challenger in Delaware Pelosi: House will stay in session until agreement is reached on coronavirus relief MORE (D-Mass.) said at a news conference. "And I think that that will provide an opportunity for Republicans and Democrats, after our committee negotiates with them over what the revenue stream ought to be, to get on with what is a sorely needed investment in America."

He added that he thinks the best path forward is to reach a bipartisan agreement on how to pay for an infrastructure bill "so there's not one-upmanship."

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House Democrats on Wednesday unveiled a $760 billion infrastructure plan, but didn't specify how they'd pay for the proposal. The Ways and Means Committee held a hearing Wednesday afternoon to discuss infrastructure financing.

Democrats said they want to work with the administration to reach an agreement on infrastructure that can receive bipartisan support, with Neal saying that he's spoken to Treasury Secretary Steven Mnuchin Steven Terner MnuchinLawmakers fear voter backlash over failure to reach COVID-19 relief deal United Airlines, unions call for six-month extension of government aid House Democrats plan to unveil bill next week to avert shutdown MORE about the issue.

But it's unclear if Trump will have much of an appetite to work with Democrats on legislation this year. A meeting between congressional Democrats and Trump in May was abruptly cut short when the president expressed frustrations over Democrats' investigations of him.

Neal also suggested that congressional scorekeepers use "dynamic scoring," taking economic effects into account, when they issue a revenue estimate of an infrastructure measure. Dynamic scoring has often been championed in the past by Republicans when they have pursued tax cuts that they argue will boost the economy.

"You want a bump in economic growth; it will come from infrastructure investment," Neal said.

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During Wednesday's hearing, Neal spoke about his support for infrastructure and economic-development financing tools such as tax-preferred bonds, the new markets tax credit and the low income housing tax credit.

The top Republican on the Ways and Means Committee, Rep. Kevin Brady Kevin Patrick BradyBusinesses, states pass on Trump payroll tax deferral Trump order on drug prices faces long road to finish line On The Money: US deficit hits trillion amid pandemic | McConnell: Chance for relief deal 'doesn't look that good' | House employees won't have payroll taxes deferred MORE (R-Texas), warned against raising taxes to pay for infrastructure. He hoped that Democrats and Republicans could pursue policies designed to encourage more private capital to be invested in infrastructure, such as creating opportunity zones for infrastructure or redesigning private-activity bonds.

"We need infrastructure, not tax increases on the American people or job-creating businesses," Brady said. "Proposals calling for the latter jeopardize any chance of attaining the former."

-Updated at 2:58 p.m.