A veteran Democratic presidential adviser said that the Trump formula is taking a clear position and driving toward it — making sure everyone knows where he stands, and only focusing on one or two policy goals at a time.

The adviser pointed to the cap on deductibility of state and local taxes — included in Trump’s tax-reform plan — as an enviable achievement.

“Presidents going back to Ronald Reagan have tried to do this,” the Democrat said. “He had the determination and skill to get it done. Clinton didn’t. Obama didn’t.”