Spending bills do not orginate with the President. Trump seems to be the most constitutionalist president we have had in a long time.
All Bills for raising Revenue shall originate in the House of Representatives; but the Senate may propose or concur with amendments as on other Bills.
U.S. Constitution, Article I, section 7, clause 1
No Money shall be drawn from the Treasury, but in Consequence of Appropriations made by Law; and a regular Statement and Account of the Receipts and Expenditures of all public Money shall be published from time to time.
U.S. Constitution, Article I, section 9, clause 7
Gee. I know that, however, the WH does compile a budget and submits to the Congress. It is required and sets a tone. Actually, I have never had any expectations about reducing the size of govt under Trump. I have always thought if we get decent judges, anything else is gravy. So far, so good.