The provision emerged from President Donald Trump’s campaign pledge to end taxes on Social Security. But experts say many are excluded.

President Donald Trump is meeting with a faction of conservative lawmakers at the White House who have threatened to sink his signature tax legislation over its $3.4 trillion price tag as lawmakers cast doubt on whether it can pass by July 4.

The Senate also pulled out a change to the Pell Grant program, which provides federal aid to low-income students to attend colleges and universities. Right now, students are considered full time and qualify for the maximum amount of aid if they take 12 credits a semester.