Why is it often difficult for Congress to check the power of the president, despite the formal checks
provided in the Constitution?

ASAP

It was difficult for congress to check because they farted

The president of the united states does not have the authority to “limit” the power of the judicial branch. however, the president can influence the political direction of decisions made by justices on the supreme court through the nomination process when a position becomes available.i would say the best answer is that he can at least interpret the laws