There's a lot of issues with the "in network" participating thing. Some providers don't want to go through the contracting process with a dozen or more payers. And even if they accept say, Blue Cross, they may only be contracted with BC PPO and not BC HMO.
Each of these contracts is a separate contract, so there's little incentive for a provider to contract with a particular payer plan unless there's a large number of patients with that plan- for example, a small town where the biggest employer in town has a particular group of plans that they offer.
The exception is Medicare- where often 60% or more of the patients will be on Medicare in the typical adult practice.
Last time I checked, there were at least 2 votes in Congress and he couldn't get the necessary votes to pass legislation... which is
actually how democracy works.
And we're going to remind you and Trump of this: