Trump administration cancels nearly $1 billion Congress had already approved
The immediate fight is over specific programs, but the bigger constitutional fight is who ultimately controls federal spending: Congress or the president.
What happened
The Trump administration announced that it would cancel nearly $1 billion in spending previously approved by Congress, using a rarely invoked rescission mechanism. The targeted funds include immigrant-service and diversity-related programs.
Republican / administration case
The White House says the cuts eliminate wasteful or harmful spending and argues that the executive branch should not be forced to spend money on programs it considers contrary to administration priorities.
Democratic / critic case
Democrats argue that Congress has the constitutional power of the purse and that presidents cannot simply erase appropriations they dislike. Critics also object to the substance of cuts aimed at immigration and diversity programs.
Libertarian / Cato case
Cato scholars have argued for substantial spending restraint but against unilateral presidential impoundment, saying Congress should make the cuts itself. Their concern is that expanding executive control over spending weakens separation of powers regardless of which party controls the presidency.
Where the disagreement really is
This splits what should be cut from who has the authority to cut it. A person can favor lower spending while opposing unilateral presidential control over appropriations.