Sparks flew when Paul Krugman and Congressman Ron Paul faced off today on Bloomberg TV’s “Street Smart” with Trish Regan and Adam Johnson…. Watch below to hear Ron Paul’s ideas about staying in the Republican race…whether he would support Romney as nominee…how U.S. monetary policy is like the Roman Empire and why there should be legal competition to the U.S. dollar (yes, gold and silver). Hear NYT columnist Krugman fire back on the role U.S. government should play in regulating the market economy…what economist Milton Friedman really thought about government stimulus…and what is the right level for debt for U.S....