Explaining what role does congress have in the appointment of federal judges?

The senate confirms the appointment of judges 

One was to hold a leash on a despot and future despots to come, another was set to ensure no despots ever came to power.

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