Coming Up on This Week with George Stephanopoulos

July 23, 2008— -- This Sunday in an exclusive interview, George is On The Trail with presumptive Republican presidential nominee Sen. John McCain (R-AZ) near Sedona, Arizona.

Then, on the "Roundtable," ABC News political contributor Matthew Dowd, and ABC News' Sam Donaldson, Cokie Roberts and George Will join George to debate the week's politics.