Mr. Obama will build entire edifices on top of one fake premise, all dressed up in one big phony assumption. Take the House GOP budget plan. It increases federal outlays from roughly $3.6 trillion this year to nearly $4.9 trillion in 2022. In the AP speech the president called this a “cut” because he wants to increase spending to $5.8 trillion in 2022.

He warned that if the GOP’s “cuts . . . were to be spread out evenly across the budget,” then “Alzheimer’s and cancer and AIDS” research would be slashed, 10 million college students denied assistance, and “thousands” of researchers and teachers “could lose their jobs.” But Republicans don’t cut across the board. Instead, their focus is on waste, duplication, programs that do not work, and on reform.

As he did Tuesday at Florida Atlantic University, Mr. Obama will attack “these same trickle-down theories” about taxes that almost led to “a second Great Depression.” But if the Bush tax cuts were so evil, why didn’t Mr. Obama repeal them during his first two years, when his party controlled both houses of Congress? Instead, in December 2010 Mr. Obama agreed to extend them for two more years.