President Trump signaled Tuesday he's close to taking executive action to shake up federal healthcare policy, after Congress continues to fail to get anywhere by itself.

"Since Congress can't get its act together on HealthCare, I will be using the power of the pen to give great HealthCare to many people - FAST!" Trump tweeted Tuesday morning.

The Trump administration has indicated it's about to take action by itself to make it easier for people to buy health insurance across state lines. Under the emerging plan, Trump will move to let people buy coverage through association health plans, which is meant to mirror the flexibility companies operating in several states have to pick the best plan for their employees.

Trump is expected to sign an executive order sometime this week to make the change.

Congressional Republicans have tried to move three bills that would repeal or reform the Affordable Care Act since January, but not made any progress.