Could Congress "bribe" the President to sign a bill by including a presidential pay raise?

Question

If Congress wanted to pass a law that they expected the President to be reluctant to sign, could they legally "bribe" the President to sign the bill by including a Presidential pay raise in it?

Answer 1

No.

Article 2, Section 1 of the Constitution states

The President shall, at stated Times, receive for his Services, a Compensation, which shall neither be encreased nor diminished during the Period for which he shall have been elected, and he shall not receive within that Period any other Emolument from the United States, or any of them.

Congress could include an increase to presidential compensation in the bill but it couldn't take effect until the next election.