Coming Up on This Week with George Stephanopoulos

This Sunday, George talks with two former presidential contenders, former Sens. John Edwards, D-N.C., now an Obama supporter, and Fred Thompson, R-Tenn., now a McCain supporter.

(AP Photo)

As the race between John McCain and Barack Obama gets off to a fast start, Edwards and Thompson weigh in on the week's big issues.

Then, on the "Roundtable," Robert Reich, Torie Clarke, Jake Tapper and George Will debate the week's politics.