Gov. John Hickenlooper told county sheriffs at a recent gathering he felt conflicted about supporting a bill that limited ammunition magazines, but because one of his "staff made a commitment," he felt compelled to sign it into law.

"To be honest, no one in our office thought it would get through the legislature," Hickenlooper, a Democrat, said in an unedited video recorded by the conservative group Revealing Politics. "There were several Democrats who said without question they weren't going to vote for it."

The measure — by far the most controversial in a package of gun-control bills signed into law in 2013 — bars the sale of ammunition magazines of more than 15 rounds. The measure passed the Democratic-controlled legislature with no Republican support.

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