“I don’t know what [House Speaker John] Boehner [R-Ohio] has going on in his caucus,” she said on MSNBC’s “Morning Joe.” “It looks like a hot, sloppy mess.”

McCaskill also touched on Senate Minority Leader Mitch McConnell’s (R-Ky.) proposal to craft a fallback position if Republicans and Democrats cannot reach a compromise on raising the debt ceiling.

“I think Mitch McConnell, frankly, has lost his mind,” she said.

She later walked back on those remarks, saying she “shouldn’t be so harsh” on him.