And it is my position that you are still wrong. Yes, the President is to submit his budget at the appropriate timeframe by law and he has done that. However, it is up to Congress to agree to the appropriations (Art. 1, Sec. 9, clause 6, "No Money shall be drawn from the Treasury, but in Consequence of Appropriations made by Law."). As such, it is their job to figure out exactly how the money under the President's budget proposal is to be spent. If they disagree with the President's budget proposal, they can come up with their own budget(s) (One from the House which is then merged with that of the Senate). Either way, it is Congress' job to figure out exactly how the money is to be spent. When they become deadlocked, it then becomes a matter where the Executive Office gets involved. Towhich, the President sent the Vice President to act in his stead. Nothing wrong with that.
All this talk about the President not showing "leadership" is just a ploy to get him involved in every detail of governance no matter how big or how small. If he's not giving a press conference on this issue or that one when the GOP insists he should, all he's done is fall right into their hands to find something to hold against him. Notice how no matter what he says there's always something someone within the GOP is critical about. Granted, it happens no matter what party is the incumbant in the White House, but this purposeful political attempt to trip him up at every turn has gotten old. It's beyond time for Congress to do its job, most of all the Republicans in Congress.