White House budget director Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE said it is likely that tax reform could be pushed into 2018 if Congress does not pass a budget resolution this week.

"If it doesn't get done this week, there's still a chance it gets done this year, but more likely it goes over into the beginning of next year," Mulvaney told Bloomberg on Tuesday, referring to passing a budget resolution in order to pass tax reform.

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"We need this reform, we need this tax package sooner rather than later, and that means by the end of this year so that we can see the benefits of that as we grow the economy soon," he continued.

The budget director added he believed the Senate was on track to pass a budget.

Mulvaney's comments come as the Trump administration attempts to work GOP lawmakers in order to score a legislative victory in the mold of tax reform.

Congressional Republican leaders hope to use a budget resolution as a means of passing tax reform legislation through the Senate with only 50 votes.

The Senate is expected to vote on the resolution this week.

Republicans, however, appear to be divided on a time frame for passing tax legislation.

House Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.) has said he would like to pass tax reform in the lower chamber by November.

“So by early November, we’ll get it out of the House. We’ll send it to the Senate,” Ryan said on Monday.

“The goal: get law in December so that we wake up with New Year’s and a new tax code in 2018," he continued.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE (R-Ky.) on the other hand is cautioning that it has taken past administrations a longer period of time to pass similarly large pieces of legislation.

“The goal is to get it done this calendar year. But it is important to remember that Obama signed ObamaCare in March of year two. Obama signed Dodd-Frank in July of year two,” McConnell said alongside President Trump on Monday.

Trump agreed that passing tax reform could take more time.

“If we get it done, that’s a great achievement,” Trump said.

“But don’t forget it took years for the Reagan administration to get taxes done. I’ve been here for nine months, a little more than nine months,” he continued.