The President checks Congress when he vetoes a bill
They can override (overrule) a veto, or a canceling of something that allows the president to check the power of congress.
Power was given to Congress in order to make sure that power was not concentrated on the President alone. Congressional power is a check on the president's power.
the president has the power to check congress through thepower of vetoing legislation that comes to his desk.
vetoing bills
Veto
The Congress and the Supreme Court provide a constitutional check on the President's powers
He or she can veto bills passed by congress
Congress can impeach a president (accuse them of a crime), override the president's veto power, and reject his or her treaties.
He or she can veto bills passed by congress
Congress can impeach the President if he commits a major crime. Congress can override the President's vetoes and Congress must approve of the President's nominations to federal positions, like federal judges.
The president has veto power over legislation that he does not want to see become law. However, with a 2/3 vote, Congress can override a veto, so this power is a check but does not nullify the power of Congress.