What role does the executive branch play in checking the power of congress?
a )it can declare war on foreign countries
b) the president may veto congressional legislation
c) congress can create federal courts and can impeachment judges
d) the president can decide that laws of congress are unconstitutional

The answer to this question is B) the President may veto Congressional legislation
President has the right to veto the proposal made by the Congress if the president believed that it does not suit his/her plan for the country. The only way for the Congress to override the veto is if they managed to convince more than 2/3 of Congress to vote with both house voting separately.