A little civics lesson
3 branches of the government- The Congress, White House and Supreme Court
In Congress, spending bills start in the House but must get through the Senate. After they are passed by both houses of Congress they go to conference to iron out differences and then its sent to the White House where the President signs it into law.
The issue here was that the Republicans only have a majority in the House. Getting the whole pie, when half of Congress is controlled by the Dems, is impossible. It simply will not happen.
So there are 2 choices- take massive political heat and possibly damage our negotiating and electoral options going forward, or get the largest 5 months of cuts in US history, declare victory and be in position to win the bigger battles.
It doesn’t seem like a hard choice to me