Sen. John McCainJohn Sidney McCainZuckerberg: Maybe tech should face some regulations Schiff mocks Trump: Obama, Bush didn't need staff warning 'do not congratulate' Putin GOP senator tears into Trump for congratulating Putin MORE (R-Ariz.) said Sunday the Obama administration engaged in a "cover-up" after the attacks in Benghazi, Libya.

"I’d call it a cover-up," McCain said on ABC’s “This Week.” "I would call it a cover-up in the extent that there was willful removal of information, which was obvious. It was obvious."

Three current and former State officials testified before Congress last week, and said they knew the attack was terrorism even as the administration was describing it as a spontaneous protest.

ABC News reported this week that talking points about the attacks were edited to remove references to terrorism. Republicans have accused the White House of downplaying the attacks in the midst of Obama's reelection campaign.

McCain said a select committee should be convened to investigate Benghazi — and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonTrump can save Republicans and restore sanity to California in 2018 Breitbart News denies readership drop, alt-right label Mellman: The next war MORE should be called back to Capitol Hill to testify. But he split with other GOP senators who have suggested that the administration’s handling of the incident could rise to the level of impeachment.

“We need a select committee that interviews everybody," McCain said. "I don’t know what level of scandal, unquote, this rises to, but I know it rises to the level where it requires a full and complete ventilation of these facts."

McCain and Sen. Susan CollinsSusan Margaret CollinsCollins: 'Extremely disappointing' ObamaCare fix left out of spending deal Overnight Cybersecurity: Zuckerberg breaks silence on Cambridge Analytica | Senators grill DHS chief on election security | Omnibus to include election cyber funds | Bill would create 'bug bounty' for State GOP lawmakers blast Dems for opposing ObamaCare fix MORE (R-Maine) both said on the Sunday shows that while they have more questions about Benghazi, they don't believe President Obama should be impeached over the attacks.

"With all due respect, I think this is a serious issue," McCain said. "I will even give the president the benefit of the doubt on some of these things. We need a select committee." Collins also dismissed talk of impeachment during her appearance on CNN's "State of the Union."

Collins and McCain were both responding to comments Sen. Jim InhofeJames (Jim) Mountain InhofeHouse members urge Senate to confirm Trump's NASA nominee Senators to Trump: Keep pressure on North Korea while exploring talks Why did this administration back the Palestine Liberation Organization in terrorism case? MORE (R-Okla.) made in a radio interview, when he said lawmakers "will maybe start to use the ‘i-word’ before too long" — meaning impeachment.

"Of all the great cover-ups in history - we’re talking about the Pentagon Papers, the Iran-Contra, Watergate and all the rest of them, this is going to go down as the most serious, most egregious cover-up in American history," Inhofe said.