Rep. Ron Paul (R-Texas) said Sunday that the Transportation Security Administration (TSA) was not in line with the Constitution and that the government should not assume the responsibility for providing security for airlines.

Speaking on CNN’s State of the Union, the Republican presidential candidate said the TSA undermines Americans’ civil liberties by forcing airline passengers into searches in order to board their flights.

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“It totally voids the concept of the 4th Amendment,” Paul said. “It doesn’t make us safe. It undermines our liberties.”

The congressman noted he voted against the Department of Homeland Security, which he called a “bureaucratic monster.” Paul said government shouldn’t be responsible for providing security for the airlines.

“It shouldn’t be government,” Paul said. “The people who protect very dangerous chemical plants, they’re private sources. … The assumption that the government has to do this is the wrong assumption.”

Last week, Paul’s son, Sen. Rand Paul Randal (Rand) Howard PaulRon Paul hospitalized in Texas The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Rand Paul says he can't judge 'guilt or innocence' in Breonna Taylor case MORE (R-Ky.), had an incident with the TSA.

Rand reportedly set off an alarm when he went through a scanner at the Nashville airport. The senator wanted to go through the machine again and refused to undergo a pat down. He said that led to him being detained by the TSA, but the agency denies that.

Paul subsequently passed through another scanner without an alarm and was able to board a later flight to Washington, D.C.