National Republican Senatorial Committee Chairman John CornynJohn CornynNew GOP ObamaCare repeal bill gains momentum Week ahead: Senators near deal to stabilize ObamaCare markets GOP eying 'blue slip' break to help Trump fill the courts MORE (Tex.) told reporters that the organization will anoint a candidate to challenge Senate Majority Leader Harry ReidHarry ReidThe Memo: Trump pulls off a stone-cold stunner The Memo: Ending DACA a risky move for Trump Manchin pressed from both sides in reelection fight MORE (D) in 2010.

According to the Las Vegas Sun, Cornyn told a group of reporters "We don't have a candidate yet...We're working on it. There'll be hopefully some news here in the coming weeks."

Cornyn's announcement, while unspecific, has heightened the speculation surrounding which potential challenger the NRSC will choose. Rep. Dean HellerDean Arthur HellerSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Lawmakers grapple with warrantless wiretapping program Overnight Health Care: New GOP ObamaCare repeal bill gains momentum MORE is rumored to be the top choice amongst Nevada Republicans. But with Heller staying mum, Republican state Sen. Mark AmodeiMark Eugene AmodeiOvernight Finance: House passes .2T funding package for 2018 | FTC launches Equifax probe | Mnuchin defends honeymoon jet request | House scraps measure to boost credit union regulator oversight Trump’s EPA budget cuts hit strong opposition at House panel MORE visited Capitol Hill this week and told the Sun early last month "If Dean doesn't, I'll consider it."

Republicans might not be in a rush to appoint a candidate to run against Reid, whose approval ratings have dipped below 40 percent. But Republicans are still watchful that the NRSC chooses a candidate who has a strong chance to unseat the four-term Senator next year.