President Trump’s 2018 budget proposal on Tuesday won’t reform Social Security or Medicare — in line with his campaign promise — but it will make serious cuts to other entitlement programs. A source with direct knowledge tells me the Trump budget will save $1.7 trillion on the mandatory side over the next ten years.

Expected reaction: In the past couple days I’ve spoken to a number of White House officials about the budget proposal. The best summary, from one White House source: “Conservatives will love it; moderates will probably hate it.” These mandatory cuts — especially to politically-sensitive programs like food stamps — will make some moderate Republicans as nervous as the recent healthcare bill did.

Balanced budget: I am told Trump’s budget will balance over ten years. To get there, it will propose tough cuts on both the mandatory and discretionary sides — e.g. to the EPA and State Department — and will assume that the U.S economy will grow at 3 percent instead of the 1.6 percent rate it grew in 2016. The 3 percent growth rate will be reached after a few years, not immediately.