WASHINGTON – Fierce and focused, Vice President Joe Biden and Republican Paul Ryan gave voters the kind of substantive showdown that was everything the presidential debate was not. Abandoning his boss' caution, Biden's uncorked a combative repair job.

"Not a single thing he said is accurate," Biden shot back when Ryan leveled a charge that President Barack Obama was projecting U.S. weakness.

So it went from Biden all night, from taxes to Iran, where he suggested Republicans wanted a war. He looked directly at the camera to implore seniors like him not to trust Ryan on his Medicare plan: "Folks, follow your instincts on this one."