The Senate's version of health care reform is catching criticism from doctors, retired Americans and even some conservatives.
The American Medical Association, or AMA, is the largest physician group in the U.S.
On Monday, the AMA sent a letter to Senate leadership about the bill. It says the bill, "will expose low and middle income patients to higher costs and greater difficulty in affording care."
The AARP hit out at the bill for letting insurers charge older customers up to five times more than younger ones. That's up from rates capped at three times higher under the Affordable Care Act, aka Obamacare.
The AMA and the AARP argue the bill unwinds Obamacare's protections for vulnerable Americans. But some important conservatives opposing the bill say it doesn't go far enough in undoing Obamacare.
Aides to the Koch network, a conservative group that plans to spend between $300 million and $400 million on the 2018 midterm elections, say they are "disappointed" in the Senate bill.
The group is against insurance subsidies and coverage requirements.
To be fair, those comments came before Republicans released a second version of the bill, which includes a penalty for people who don't buy health insurance. The Congressional Budget Office also released its score for the first Senate bill on Monday.