Who has the power to approve and veto laws

The US President, or the Executive Branch, as the power to approve or veto laws. The Governor and Mayor may also approve or veto law in their jurisdiction. Although, it is safe to say the first statement. I am iffy on the second statement.

Opposition to the nra came to a head in 1935, when the conservative supreme court declared the agency unconstitutional, claiming the nra gave the executive branch regulatory powers that belonged exclusively to congress. this decision began a series of court decisions that overturned key elements of the new deal.