Rep. Tom CottonThomas (Tom) Bryant CottonChinese official accuses US of 'pushing our two countries to the brink of a new Cold War' Sunday shows preview: States begin to reopen even as some areas in US see case counts increase Senate Republicans call on DOJ to investigate Planned Parenthood loans MORE (R-Ark.) blasted President Obama for signing off on a deal to exchange U.S. soldier Bowe Bergdahl for five Taliban commanders, calling it a "grievous error" that could cost U.S. lives.

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"There is now a price on the head of American hostages, and Barack Obama has helped put that price there by breaking with a decade-long bipartisan consensus," Cotton, a Senate candidate and Iraq and Afghanistan war veteran, told Arkansas podcast host J.R. Davis.

"I wouldn't have traded five senior Taliban commanders for any POW," he continued. "I would have continued to use intelligence resources and special operations units to try to retrieve Beau Bergdahl, or any POW for that matter. But I would not release senior hardened Taliban commanders. These are not goat herders or foot soldiers. These are the equivalent of their secretary of Defense or their CIA director. They are going to go back in the battlefield. That is going to happen. And they're going to help kill Americans in the future."

Cotton and Sen. Mark PryorMark Lunsford PryorCoronavirus poses risks for Trump in 2020 Tom Cotton's only Democratic rival quits race in Arkansas Medicaid rollback looms for GOP senators in 2020 MORE (D-Ark.) are locked in a tight battle in a top-priority race for both parties. Pryor is considered one of the most vulnerable Senate Democrats.