President Trump is expected to announce Friday that Medicaid programs in all 50 states will have access to most-favored-nation pricing for certain drugs. The model would use prices in other countries as benchmarks, with participating states receiving supplemental rebates from drugmakers. The White House says the effort could save more than $64 billion, but has not explained the calculation. Medicaid already receives significant prescription-drug discounts, leaving the additional savings and effect on everyday prices uncertain. Trump will be joined by several governors at an Oval Office event scheduled for 2:30 p.m. EDT. The announcement comes as affordability remains a key issue for voters ahead of the midterm elections. The move follows the February launch of TrumpRx, which now lists hundreds of generic drugs, and broader administration agreements with 17 major drugmakers to offer prices comparable with those in other developed countries.