WASHINGTON (CNN) -- Brushing aside GOP criticisms of his resolution condemning President Bush's call for a troop increase in Iraq, Sen. Chuck Hagel, R-Nebraska, strongly urged his colleagues Wednesday to take a stance on the president's Iraq policy.

"We'd better be damned sure we know what we're doing, all of us, before we put 22,000 more Americans into that grinder," Hagel said in an impassioned speech in a Foreign Relations Committee hearing. "We better be as sure as you can be, and I want every one of you -- every one of us 100 senators to look in that camera and you tell your people back home what you think. Don't hide anymore. None of us."

Hagel also responded to fellow GOP committee member Richard Lugar who claimed the passing of Hagel's resolution would likely send a show disunity between Congress and the president and show the nation’s enemies that “we are divided and in disarray."

"We fail our country if we don't debate this -- if we don't debate this we are not worthy of our country," Hagel said. "We fail our country."

"Stop the impugning of people's motives," Hagel added. "Stop the political stuff -- all of us. All of us. This is much bigger than that. And if we're not adult enough to understand that, we will loose the confidence of the American public. That's what's happened right now.