President Trump’s 2020 budget includes up to $1.2 trillion in “potentially phantom revenues” — money that comes from taxes the administration opposes or from tax hikes that face strong opposition from businesses, The Wall Street Journal’s Richard Rubin reports, citing data from the Committee for a Responsible Federal Budget. That total, covering 2020 through 2029, includes as much as $390 billion in taxes created under the Affordable Care Act, which the president wants to repeal.

The $1.2 trillion in questionable revenue projections is in addition to the White House budget’s projected deficits of $7.3 trillion for the 10-year period. That total is itself questionable, given that the president’s budget relies on optimistic assumptions about economic growth and some unrealistic spending cuts, meaning that the deficits could be significantly higher than projected.