Sen. Marco RubioMarco RubioTHE MEMO: Trump takes the fight to Congress Rubio says town halls designed for people to 'heckle and scream' At CPAC, Trump lashes out at media MORE (R-Fla.) argued Thursday that it’s President Obama, not Republican leaders in the House and Senate, who is responsible for threats of a government shutdown over the implementation of ObamaCare.

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"This September, Congress will have to pass another short term spending bill to fund the federal government,” Rubio wrote in an op-ed for Fox News. 

“We should pass one that keeps the government open, but doesn't waste any more money on ObamaCare. The president and his allies – and even some Republicans – will accuse us of threatening to shut down the government. In fact, it is President Obama who insists on shutting down the government unless it funds his failed ObamaCare experiment.”

Sen. Mike LeeMike LeeLessons from the godfather of regulatory budgeting Congress must reform civil asset forfeiture laws A guide to the committees: Senate MORE (R-Utah) says he’s recruited more than a dozen Republican colleagues willing to shut down the government by blocking a continuing resolution to fund the government beyond Sept. 30 if it includes funding for ObamaCare.

The second- and third-ranking members of Republican leadership, Sens. John CornynJohn CornynCornyn: Border wall 'makes absolutely no sense' in some areas Ryan on border: ‘We will get this done’ Ryan tours Mexican border on horseback MORE (Texas) and John ThuneJohn ThuneYahoo reveals new details about security Conquering Trump returns to conservative summit Low-income consumer broadband credits mean competitiveness, choice and compassion MORE (S.D.), have said they support Lee’s plan, as do influential conservatives and potential presidential candidates Sens. Marco Rubio (Fla.) and Ted CruzTed CruzTHE MEMO: Trump takes the fight to Congress Brietbart CEO reveals that Trump donors are part owners At CPAC, Trump lashes out at media MORE (Texas).

A number of conservative groups are pressing Senate Majority Leader Mitch McConnellMitch McConnellMarch is the biggest month for GOP in a decade This week: Trump makes first address to Congress Week ahead: Confirmation votes lined up for Energy, Interior picks MORE (R-Ky.) to back Lee. Heritage Action endorsed the effort on Tuesday, and the Club for Growth penned a letter to McConnell on Wednesday urging him to sign on to the plan.

In addition, 64 House members have signed on to a similar effort to try and block the president’s signature healthcare reform law, with some arguing the GOP could use the debt ceiling as leverage against its implementation.

However, two Republican senators – Roy BluntRoy BluntA guide to the committees: Senate Judiciary Committee wants briefing, documents on Flynn resignation Intel Dem: House GOP now open to investigating Flynn MORE (R-Mo.) and John McCainJohn McCainFather of slain Navy SEAL wants investigation A stronger NATO for a safer world Drug importation won't save dollars or lives MORE (R-Ariz.) say they oppose efforts to shut down the government to block funding for ObamaCare.

Rubio on Thursday said the law should be replaced with “market-based” reforms.

“It is time to admit that ObamaCare isn't going to work, decide not to waste a single cent more on it, and replace it with market-based reforms that will give people more health insurance choices and options,” he wrote.