I'm sorry, but do you have any idea what you are talking about? If he is or isn't going to veto a bill, what do you think he should be basing his decision on if not the Constitution. I have a problem believing that anyone could seriously say that. Should he base it on if it meets his agenda? Maybe based on what side of the bed he got out on?
I absolutly expect a President to base ALL decisions on the Constitution including vetos just like Andrew Jackson.
Andrew Jackson's veto
If he is or isn't going to veto a bill, what do you think he should be basing his decision on if not the Constitution. On policy grounds as they always do. The president takes an oath to preserve and to defend the constitution NOT to interpret law. Declaring a bill unconstitutional is a legal decision that the president does not posses. He can speak his mind and he can have his Solicitor General mount a challenge to a law that he likes except for the parts he feels are unconstitutional. I sure as hell do not want one man having constitutional veto. That is not protecting and defending the constitution.. Policy and those disputes are fine