Sen. Rob Portman Robert (Rob) Jones PortmanRomney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery House passes B bill to boost Postal Service MORE (R-Ohio) on Tuesday expressed concern over the idea of a repeal-only healthcare bill.

"I have to look and see what the so-called repeal bill entails, but if it is a bill that simply repeals, I believe that will add to more uncertainty," Portman told reporters. "And the potential for Ohioans to pay even higher premiums, higher deductibles."

Portman said he would look for an analysis from the Congressional Budget Office on a bill repealing ObamaCare.

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"To see what it involves in terms of not just premiums and deductibles, but coverage," he said.

"So, I'll take a look at it, but I'm concerned about something that would simply repeal and its impact on costs and choices and healthcare."

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE (R-Ky.) late Monday said the Senate would try to separate ObamaCare repeal and replacement after the Senate's current healthcare bill collapsed.