President Trump may accept a Republican tax plan that includes a 22 percent corporate tax rate if doing so ensures the bill's passage, White House press secretary Sarah Sanders said Thursday.

"Our focus has been on getting the lowest corporate rate possible," Sanders told reporters at the White House on Thursday.

Republicans in the House and Senate have passed similar tax reform bills that cut the corporate tax rate from 35 percent to 20 percent. However, a pair of conservative lawmakers — Sens. Marco Rubio, R-Fla., and Mike Lee, R-Utah — have proposed an amendment that would raise the corporate tax rate to 22 percent in order to pay for an expansion of the child tax credit.

"Fifteen is better than 20. Twenty is better than 22," Sanders said of the rate change. Trump had called for corporate taxes to be brought down to 15 percent on the campaign trail.

"Twenty-two is better than what we have," Sanders said.

"We're not going to negotiate that from the podium," she added.

Sanders' comment came hours after Kevin Hassett, Trump's top economist, said the president is "acutely aware" that elements of the tax plan could "move around" in conference, where House and Senate Republicans are ironing out the differences between their bills in order to arrive at a final product they can send to Trump's desk.