Perhaps you don't. The article doesn't identify anything about where spending reductions will be made, just the targeted goal amounts. Medicaid is mentioned as a possibility multiple times in the article, even by people on the right.
-“I’ve just got to feel adequately assured that Medicaid is going to remain intact, except for the waste, fraud and abuse,” said Rep. Jeff Van Drew (R., N.J.).
"Some House Republicans are sensitive to what such reductions could mean for federal programs such as Medicaid, the federal-state health-insurance program for low-income Americans. Party leaders received support from Trump in the hours before the vote, with the president talking to members who had stated their opposition and urging them to back the framework."
So while what Chris94 said is untrue right now, it could eventually be true in the future once the tax and spend bill noted in the article actually happens.