Sen. John McCainJohn McCainSenate: Act now to save Ukraine A Cabinet position for Petraeus; disciplinary actions for Broadwell after affair Meet Trump’s ‘mad dog’ for the Pentagon MORE (R-Ariz.) said that he had "grave concerns" about President Obama's nomination of former Sen. Chuck HagelChuck HagelLobbying World Ex-Dem leader: Clinton should include GOP in Cabinet Even Steven: How would a 50-50 Senate operate? MORE (R-Neb.) as secretary of Defense and said he was leading toward a “no” vote.
"I will see the rest of the answers to his questions but certainly I have very grave concerns," McCain told Fox News's Chris Wallace Sunday morning.
But McCain reiterated his opposition to filibustering Hagel.
"We have never filibustered a cabinet appointee. That's why I believe we should not filibuster this nomination," he said. "We've never filibustered a presidential cabinet appointee and I don't think we should start here. Elections have consequences, unfortunately."
McCain also called for a way to avoid the looming bipartisan sequestration cuts, arguing that both "Republicans and Democrats are responsible for this new cliff" and warning that the "consequences are severe." But he said that he wanted to see a way to avoid it without new tax revenues.
"Would I look at some revenue closers? Maybe so," he said. "But we just raised taxes. Why should we have to raise taxes again?"
Both parties hope to avoid the across-the-board cuts slated to take effect on March 1, but are at loggerheads on how to do so. Republicans argue the bill should be replaced solely by cuts to spending, while Democrats want to see a mix of cuts and increases in revenue.
On Saturday, President Obama President Obama warned in his weekly address that sequestration would deal a "huge blow to middle-class families and our economy as a whole."
McCain also ripped the administration's ongoing refusal to arm the Syrian rebels against their government in the country's ongoing civil war.
"I think they're writing one of the most shameful chapters in American history," he said, arguing that it was both a humanitarian crisis and a missed opportunity to weaken Iran, which is an ally of Syria's government.
Defense Secretary Leon Panetta last week revealed that he had backed a plan to arm opposition forces seeking the ouster of Syrian President Bashar al-Assad. The plan, though, was overruled by the presidnet, who expressed concerns that the weapons would fall into the wrong hands.