President Obama and Mitt Romney are getting ready for their primetime showdown this Wednesday in Denver. Both candidates are engaged in last minute tactics and trying to downplay their chances at the debate but it’s clear the stakes are high. Ron Brownstein is CNN’s Senior Political Analyst and Editorial Director of the National Journal Magazine. He joins Zoraida Sambolin on “Early Start” this morning with more on what to expect.

 “The history of debates is it’s not predictable,” Brownstein says. “Some years they matter, and other years, they haven’t.”