That is what happened here. Republicans came to the table and said “we will give you Ukraine aid if we get a border deal”. Biden undercut progressives and started making offers that Republicans wanted for Ukraine aid and to put his name on the border deal. So Republicans took their ball and went home.
If the Dems agreed to a Republican law, the Republicans would probably filibuster their own law.
That is what happened here. Republicans came to the table and said “we will give you Ukraine aid if we get a border deal”. Biden undercut progressives and started making offers that Republicans wanted for Ukraine aid and to put his name on the border deal. So Republicans took their ball and went home.