Sen. Jeff Sessions (R-Ala.) said there are likely people on the terrorist watchlist who shouldn’t be.

“So, the problem is, you have indications on this list of people who might be involved in terrorism. And we need to keep a list of that, need to do the best we can to monitor those people, so that they don’t become an active terrorist person,” he said Sunday on CNN’s “State of the Union.”

{mosads}”But a lot of people may be wrongly on the list. In fact, I’m sure there are a lot of people on that list that shouldn’t be on it.”

The Senate will vote on Monday on gun control proposals after Democrats staged a filibuster to force debate on the issue following the deadliest mass shooting in American history last weekend in Orlando.

Sen. John Cornyn (R-Texas) proposed a measure that would allow the attorney general to delay suspected terrorists from purchasing a gun for up to 72 hours while seeking a court order to stop the sale.

Sessions said he supports a measure requiring authorities to prove probable cause in three days, noting a person should have the chance to defend themselves.

“If you’re going to deny a person a constitutional right like free speech or the right to have a firearm, then … that person has to have an opportunity to explain that they shouldn’t be on the list,” he said.  

“Republicans have voted consistently to ban people … on that list from having a gun, but to give them an opportunity to prove they shouldn’t be on the list.”

The executive vice president of the National Rifle Association on Sunday criticized the Democratic push for gun control laws.

“It’s like they’re trying to stop a freight train with a piece of Kleenex,” Wayne LaPierre said on CBS’s “Face The Nation.”

But Sen. Chris Murphy (D-Conn.), the senator behind the 15-hour filibuster last week to push for votes on several gun control measures, said his talkathon “helped galvanize” the U.S. about the issue and expressed optimism about Congress taking action.

“And so I’m still hopeful that we’re going to be able to get votes. I know there are also some compromise negotiations happening that may bear fruit,” Murphy said Sunday on ABC’s “This Week.”