Conservative senators on Thursday threatened to hold up any Senate legislation that doesn’t specifically deal with reducing the nation’s debt. 

In a letter to Senate Majority Leader Harry ReidHarry Mason ReidAmendments fuel resentments within Senate GOP Donald Trump is delivering on his promises and voters are noticing Danny Tarkanian wins Nevada GOP congressional primary MORE (D-Nev.), the senators complained that only three hours of debate were scheduled Wednesday before votes on dueling proposals to reduce spending.

“This debate gave only a limited (three hours) opportunity to debate what many Americans believe is the issue of our time — cutting government spending and dramatically reducing our national debt,” said the letter to Reid.

A spokesman for Senate Minority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellFlake threatens to limit Trump court nominees: report Senate moving ahead with border bill, despite Trump On The Money — Sponsored by Prudential — Senators hammers Ross on Trump tariffs | EU levies tariffs on US goods | Senate rejects Trump plan to claw back spending MORE (R-Ky.) said more time needs to be given in the Senate for debating the nation's debt woes. 

“Senator McConnell appreciates their focus on the most important issue facing our country right now – the out of control spending and rising national debt – and agrees that there should be sufficient floor time to debate this issue in advance of reaching our statutorily-mandated debt limit,” McConnell spokesman Robert Steurer said.

Hours were consumed on the Senate floor on Monday on debate over the Patent Reform Act, which ended up passing the Senate. Reid plans to move to a small business bill next.

The lawmakers also criticized Reid for not allowing them to offer amendments to the measures.

“This statement is clear,” said Sen. David VitterDavid Bruce VitterSenate panel advances Trump nominee who wouldn't say if Brown v. Board of Education was decided correctly Planned Parenthood targets judicial nominee over abortion comments Trump nominates wife of ex-Louisiana senator to be federal judge MORE (R-La.) in announcing the letter on the Senate floor. “This is a crisis. We need to act before we reach the debt limit. Let’s act now. Lets not move to other cat and dog bills that may be positive legislation but can certainly wait.”

The letter was also signed by Sens. Jeff SessionsJefferson (Jeff) Beauregard SessionsDOJ requests military lawyers to help prosecute immigration crimes: report Trump backs down in rare reversal Senate moving ahead with border bill, despite Trump MORE (R-Ala.), Marco RubioMarco Antonio RubioSenate moving ahead with border bill, despite Trump Hillicon Valley: New FTC chief eyes shake up of tech regulation | Lawmakers target Google, Huawei partnership | Microsoft employees voice anger over ICE contract Lawmakers urge Google to drop partnership with Chinese phone maker Huawei MORE (R-Fla.), Jim DeMint (R-S.C.), Rand PaulRandal (Rand) Howard PaulOvernight Health Care — Presented by the Association of American Medical Colleges — Key ObamaCare groups in limbo | Opioids sending thousands of kids into foster care | House passes bill allowing Medicaid to pay for opioid treatments US watchdog: 'We failed' to stem Afghan opium production Senate passes 6B defense bill MORE (R-Ky.), Pat Toomey (R-Pa.), Mike LeeMichael (Mike) Shumway LeeGOP senators introduce bill to prevent family separations at border Another chance to seek the return of fiscal sanity to the halls of Congress Trump plan to claw back billion in spending in peril MORE (R-Utah) and John Ensign (R-Nev.)

If Reid dedicates significant time to debating the budget crisis prior to when the government is expected to reach its debt ceiling, the senators said they would drop their objections. 

“Our objections would be withheld if the Senate agrees to dedicate significant floor time to debate this issue well in advance of the federal government reaching our statutorily mandated debt limit,” said the letter.

The Senate began a roll call vote on the the nomination of Max O. Cogburn, Jr. to be United States District Judge for the Western District of North Carolina at about 3 p.m. That is the last vote scheduled for Thursday in the Senate.

This story was updated at 6:27 p.m.