Coming Up on 'This Week': Sen. Pat Toomey, Colin Powell

WASHINGTON, Nov. 23, 2011— -- After months of negotiations, the Joint Select Committee on Deficit Reduction failed to compromise on a bipartisan deal to cut the deficit by at least $1.2 trillion. On Sunday, supercommittee member Sen. Pat Toomey, R-Pa., comes to "This Week" to explain why Republicans and Democrats couldn't come together for a final deal.

Will Congress allow the mandatory cuts to defense and domestic program spending to be triggered by the committee's failure? Are there still prospects for continued negotiations on deficit reduction in the coming months, or will election-year politics sideline any action? And has Congress cemented its reputation as a place where nothing can get done?

The "This Week" roundtable tackles the fallout from the supercommittee failure and all the week's politics, with ABC's Cokie Roberts and Sam Donaldson, ABC News senior political correspondent Jonathan Karl, and Washington Post columnist Michael Gerson.

Then, as the nation celebrates Thanksgiving, former Secretary of State Colin Powell joins Christiane Amanpour to discuss how we can all give back -- with service to fellow Americans and the country. The founding chairman of America's Promise Alliance on volunteerism and service, only on "This Week."

Plus, actor and activist Matt Damon is focusing his attention on something many of us take for granted: access to clean water. Nearly a billion people worldwide lack access to safe water supplies, with over 3.5 million people dying each year from water-related diseases. Damon and Gary White, co-founders of Water.org, come to "This Week" to explain how access to clean water and sanitation can change the health and economic lives of billions in need.

And "This Week" follows up with Microsoft chairman Bill Gates on his "Giving Pledge," launched last year, as he pushes for more of the country's billionaires to commit the majority of their fortunes to charity.