Three key panels are addressing some of the thorniest issues poised to make or break the Republicans' massive bill for Trump's agenda.

In addition to raising the endowment tax rate for the richest schools to as much as 21%, the bill hits schools with heavy foreign student enrollment.

It targets several clean energy tax credits implemented under the Democratic reconciliation bill passed under President Joe Biden, including eliminating tax credits for electric vehicles, credits for clean energy home investments, and sunsets tax credits for certain types of renewable energy production.

Republicans in the U.S. House of Representatives on Monday proposed killing the electric vehicle tax credit and repealing fuel efficiency rules designed to prod automakers into building more zero-emission vehicles as part of a broad-based tax reform bill.