Senate Majority Leader Harry ReidHarry ReidGOP frustrated by slow pace of Trump staffing This week: Congress awaits Comey testimony Will Republicans grow a spine and restore democracy? MORE (D-Nev.) harshly criticized Newt Gingrich (R-Ga.) on Monday for shifting his rhetoric on the House-passed Republican budget, which Democrats contend would "kill Medicare."

"Though the Republican House passed the Medicare-killing plan almost unanimously, sometimes it’s difficult to tell where the Republican Party stands generally," said Reid.

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"Look how quickly one prominent Republican candidate spun himself in circles last week," said Reid. "First he called the plan for what it was — radical. He said it was right-wing social engineering, that's a quote. Hours later, after Republicans jumped all over him, he reversed course and said he supports the plan to kill Medicare."

"And remember he said it’s radical, it’s right-wing social engineering and suddenly he said it’s OK," concluded Reid. "That is some real interesting gymnastics."

Gingrich said last week he had apologized to Rep. Paul RyanPaul RyanOvernight Finance: Dems introduce minimum wage bill | Sanders clashes with Trump budget chief | Border tax proposal at death's door Sasse: Mont. Republican doesn't understand First Amendment Pelosi: Gianforte is ‘a wannabe Trump’ MORE (R-Wis.), the budget plan's author, for his criticism of its Medicare reforms. Gingrich's spokesman said his boss's previous comments had included "inartful terms."

The GOP plan would cut $5.8 trillion in spending over 10 years and transform Medicare into a sort of voucher system. It would balance the budget by 2040 without raising taxes. 
 
The budget proposal passed the House in March in a 235-193 with no Democratic support. Four Republicans opposed it.