A Senate vote to repeal healthcare reform could come as early as this week, a senior Republican senator said Tuesday. 

Sen. 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 (R-Texas) wrote that the Senate could vote on House-passed legislation to do away with President Obama's signature healthcare law. Any such vote would come on the heels of a federal judge's decision on Monday to strike down the whole law as unconstitutional.

Cornyn said on Twitter:

Vote on HC repeal could come as early as this week in the Senate

Republicans, led by Minority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellSenate passes 0B defense bill Overnight Health Care: New GOP ObamaCare repeal bill gains momentum Overnight Finance: CBO to release limited analysis of ObamaCare repeal bill | DOJ investigates Equifax stock sales | House weighs tougher rules for banks dealing with North Korea MORE (R-Ky.), have vowed to force a Senate vote to repeal healthcare reform. Sen. Jim DeMint (R-S.C.) introduced legislation mirroring the House's repeal bill, which passed through the lower chamber, and by Monday, all GOP senators had signed onto it as a co-sponsor, suggesting a united Republican front for repeal in the Senate.

But although McConnell has certain procedural tactics available to him, Democrats and 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-Nev.) appear disinclined to allow a vote on repeal, even if it's likely to fall short of passage. Twenty-three Senate Democrats face reelection in 2012, some of them in conservative or swing states. Forcing them to take a vote for the record on repeal would almost certainly be used against them by the GOP in the 2012 elections.

It's not clear that Monday's court ruling will at all encourage Reid to allow a vote on repeal, though the politics have certainly engrossed the upper chamber. The Senate's No. 2 Democrat, Dick DurbinRichard (Dick) Joseph DurbinSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Senate passes 0B defense bill MORE (Ill.), said he'll chair a hearing this week on healthcare reform's constitutionality.