List one way in which congress can check the power of the president

The president exercises a check over Congress through his power to veto bills, but Congress may override any veto (excluding the so-called "pocket veto") by a two-thirds majority in each house. When the two houses of Congress cannot agree on a date for adjournment, the president may settle the dispute.

The president exercises a check over Congress through his power to veto bills, but on the other hand Congress may override any veto  by a two-thirds majority in each house, this means that they can discard the veto and never go through with it. When the two houses of Congress cannot agree on a date for adjournment, the president may cancel the dispute.