HOW REPUBLICANS will find enough budget savings to pay for tax cuts is the political maths question of 2025. One of the most important calculations involves Medicaid, a government health programme for poor and disabled Americans. The problem is that Donald Trump has promised not to touch it, pledging to protect it for “the most vulnerable, for our kids, pregnant women.” On May 12th he also promised to lower prescription drug prices, although his plan is vague. Mr Trump’s populism on health benefits complicates the work of congressional Republicans hoping to slash spending. The committee that oversees Medicaid has finally released its proposal. Its outline steers clear of the deepest cuts that had been debated in Washington, but it nonetheless seeks large savings by imposing work requirements on Medicaid recipients who are unemployed.