Which of these is a power of the United States President?

you didn't give us options, but the president has the power to: protect his/her nation against an attack, veto bills, speak to leaders of other countries, nominate high officials (cabinet members and supreme court justices), and grant pardons.

However, presidents cannot declare war, make laws, or interpret laws.

Hope this helps!

a system of cooperative federalism emerged, as the powers of the federal government expanded.