FILE - In this Oct. 15, 1992 file photo, President Bush, left, talks with independent candidate Ross Perot as Democratic candidate Bill Clinton stands aside at the end of their second presidential debate in Richmond, Va. Finally, the fall season delivers the matchup Americans have been waiting for, President Barack Obama goes one-on-one with Republican Mitt Romney in three prime-time debates. With the race a dead heat, the debates take on an oversized role in the few weeks between now and Election Day. One small mistake or impression _ a glance at a watch, repetitive sighing _ could roil the campaign for days and linger in voters’ mind. This is especially true for two polished candidates who will have the soundbites and rhetoric down cool. (AP Photo/Marcy Nighswander, File)