A group of Senate Republicans is slamming President Obama as having failed to respond to Iran's ballistic missile tests. 

"A continued failure of the administration to impose consequences on Tehran for its ballistic missile tests... will confirm the dangerous perception of the regime in Iran that it can ignore its obligations with impunity and the Obama administration will do nothing," Republican Sens. Kelly AyotteKelly AyotteOPINION: Democracy will send ISIS to the same grave as communism Kelly Ayotte joins defense contractor's board of directors Week ahead: Comey firing dominates Washington MORE (N.H.), Richard BurrRichard BurrBurr: Nunes 'created' unmasking allegations against Rice Susan Rice met with Senate Intelligence Committee as part of Russia probe Overnight Cybersecurity: State Department reportedly eliminating cyber office | Senate Intel chief avoids White House during Russia probe | Dem pushes 'ethical hacking' resolution MORE (N.C.), Lindsey GrahamLindsey GrahamBusiness pressure ramps up against Trump's Ex-Im nominee Senators who have felt McCain's wrath talk of their respect for him McCain absence adds to GOP agenda’s uncertainty MORE (S.C.) and Mark KirkMark KirkMcConnell: Senate to try to repeal ObamaCare next week GOP senator: Not 'appropriate' to repeal ObamaCare without replacement GOP's repeal-only plan quickly collapses in Senate MORE (Ill.) said on Monday. 
 
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Obama is under pressure from both parties to take a firm line in response to Tehran's two ballistic missile tests late last year. 
 
The Republican senators said the administration should roll out a "strong set of sanctions" and refrain from lifting sanctions against Iran under a separate nuclear agreement until Iran ends any military dimensions to the program. 
 
While the administration, and key Democrats, have argued that the missile tests are separate from the nuclear agreement, Republicans argue that the two are inextricably linked because the missiles could potentially carry a nuclear warhead. 
 
Ayotte introduced legislation last month that would block the Obama administration from lifting sanctions, which could threaten the nuclear pact.
 
The administration had been expected to announce sanctions against Iranian individuals and companies involved in missile development, but has walked that back. 
 
White House press secretary Josh Earnest told reporters earlier Monday that new sanctions have been "considered" by the Treasury Department. 
 
"This is an option that has been on the table for some time," he said. "Ultimately we will impose those financial penalties, we will impose those sanctions, at a time and place of our choosing."