WASHINGTON - President Donald Trump privately pressured Speaker Mike Johnson (R-La) on Wednesday's call.

Trump's 11-hour demands add new wrinkles to the already complex process for Republican lawmakers to desperately try to find enough savings for the bill, which aims to expand the president's 2017 tax cuts, increase funding for immigration enforcement and defense, and raise debt restrictions.

According to a Republican who is familiar with the call, the White House revolved around the idea of ​​hiking the highest tax rate for the wealthiest Americans in the past few months, and now believes that this will be close to finalizing the highest tax rate for the bill.

Another Republican source familiar told NBC News that Trump is considering allowing individuals with $2.5 million or more a year to return from 37% to 39.6% before 2017 to help pay for middle-class and working class tax cuts and protect Medicaid.

Punchbowl News first reported Trump-Johnson's call.

While the Republican Party has previously proposed the idea of ​​allowing tax rates to increase the highest income, and the main part of the 2017 tax law expires at the end of this year, Republican leaders boycott tax hikes on wealthy, traditionally protesting tax hikes in the party. But leadership is now reconsidering its options as Trump urges Johnson to reverse the path while House Republicans work hard to work hard for their massive bills.

A Republican, who was closely involved in the negotiations, confirmed to NBC News that conversations within the House GOP meeting have resumed over the past 24 hours about the possibility of allowing the highest tax rate to rise and closed the interest loopholes carried.

Asked about taking these new suggestions seriously, Republicans told NBC News: "At this point, we have to find savings, so I think everything is being considered."

The House Methods and Means Committee, written by the tax, plans to mark a part of its settlement bill next week, but is still addressing many tricky issues such as how to increase the tax rates on state and local tax deductions or salt. House Republican leaders aim to pass the final package on the floor by Memorial Day, an ambitious timeline.