Sen. Roger WickerRoger WickerAs US healthcare changes, preventative screenings can't stop A guide to the committees: Senate Pruitt confirmation sets stage for Trump EPA assault MORE (R-Miss.) said on Thursday that he remains uncertain if the Senate will vote on a healthcare reform bill this calendar year.

"I don't know if it ever will, this year get to the floor," Wicker said in a local radio interview.

The second-term Republican's comments come at a time when great confusion surrounds the fate of healthcare reform in both the House and the Senate.

Just yesterday, Senate Republican Conference chair Lamar AlexanderLamar AlexanderOvernight Regulation: Trump's Labor nominee hints at updating overtime rule Trump's Labor pick signals support for overtime pay hike Live coverage: Day three of Supreme Court nominee hearing MORE (Tenn.) said that President Obama and Congress "could pass a bill today."

Senate Finance Committee chairman Max BaucusMax BaucusGOP hasn’t reached out to centrist Dem senators Five reasons why Tillerson is likely to get through Business groups express support for Branstad nomination MORE (D-Mont.) had set a September 15 deadline for his committee to present a bipartisan version of the legislation. Finance Committee Republicans and Democrats have been locked in intense negotiations over how to pay for the reforms.

Finding appropriate funding sources for healthcare reform programs has been a very sticky subject in Congress.

Wicker decried the current legislation for helping fund the cost of a new public health insurance option by shifting Medicaid expenses to the states and cutting Medicare.

"This is the mother of all unfunded mandates," Wicker said, quoting Tennessee Gov. Phil Bresden (D).

In addition to the obstacles facing the Finance Committee, high-profile Democrats, including President Obama, have urged the Senate to work quickly. Some Senate Democrats vowed to force a party line vote on the bill if the Finance Committee skips its self-imposed deadline.

On the other hand, Senate Minority Whip Jon Kyl (R-Ariz.) called the deadline a bluff, saying that bipartisan negotiations would continue past mid-September.

In the House, Democratic leadership and centrist Blue Dog Democrats struck a bargain to move the legislation through the Energy and Commerce Committee, but the floor version of the bill is still unknown.