Sessions joins Sens. John McCainJohn Sidney McCainGOP moves to cut debate time for Trump nominees GOP advances proposal to change Senate rules Julian Castro predicts Arizona will 'go blue' for Senate, presidential election MORE (R-Ariz.) and Lindsey GrahamLindsey Olin GrahamGOP anxiety grows over Trump’s Iran decision Overnight Cybersecurity: Senators eye path forward on election security bill | Facebook isn't winning over privacy advocates | New hacks target health care Paul backs Pompeo, clearing path for confirmation MORE (R-S.C.) in opposing the sequestration of defense funding. On Monday, those two senators released a statement that said the cuts "cannot be allowed to occur."

McCain in particular has argued that the required cuts would come on top of the $350 billion in cuts that Defense already faces, and nearly $200 billion in other reductions that former Defense Secretary Robert Gates imposed.

Sessions said that the Defense Department makes up about one-sixth of the federal government, and therefore should not have to shoulder half of the $1.2 trillion sequester. McCain and Graham said they are looking for ways around these cuts, and House Armed Services Committee Chairman Buck McKeon (R-Calif.) said he is preparing a bill for that purpose.