This is how…
Congress has occasionally refused funding for the president even when controlled by the same party, primarily through the use of appropriations and budgetary measures. A notable instance occurred during President Richard Nixon’s administration in the 1970s, when he attempted to withhold funds for various programs authorized by Congress. This led to significant controversy and public hearings, as critics argued that Nixon was using his impoundment powers to effectively veto congressional spending decisions.
Another example is from recent events in late 2024, where House Republicans, despite being from the same party as President Trump, rejected a funding bill he backed. This situation highlighted internal divisions within the party, as many Republicans joined Democrats to vote against the proposal, demonstrating that even within a unified party, disagreements can lead to funding refusals.