Romney at the DNC

Democrats and Republicans have long appeared at each other's conventions, trying to get a piece of the non-stop media attention.

Usually, the opposition sends only second-tier spokespeople into the cities occupied by the "enemy."

But this year, the Republicans have fielded some of their biggest stars. New York Mayor Rudy Giuliani and Massachusetts' former Governor Mitt Romney have come to Denver. In fact, Romney was inside the Democratic Convention Hall last night.

WBUR's Fred Thys reports.