Michelle Obama, wife of Democratic Presidential Candidate Sen. Barack Obama (D-IL), attends a roundtable discussion with military spouses in Norfolk, Virginia. She will discuss her husband's plans to help service members and their families, and take questions from a group of invited guests. Later, Sen. John McCain (R-AZ) speaks at a Disabled American Veterans event in Las Vegas, NV.

This week Sen. McCain (R-AZ) focused on the economy, traveling to Wisconsin where he spoke to voters at a town hall meeting. Coverage includes a behind the scenes look at the Town Hall meeting and a definition on why Wisconsin is one of the 2008 "battleground" states.

Libertarian presidential candidate Bob Barr joins us for an in depth interview. Also, coverage of the Green Party convention in Chicago. Former Rep. Cynthia McKinney (D-GA) is expected to accept the party nomination for president.

C-SPAN interviews Independent presidential candidate Ralph Nader. He discusses health care policy, corporate influence on politics and the two-party system. Then, two possible vice presidential candidates attend state party fundraisers. First, Gov. Kathleen Sebelius (D-KS) speaks at the Ohio Democratic Party's "Family Reunion" State Dinner. Later, Gov. Tim Pawlenty (R-MN) gives the keynote address at the Connecticut Republican Party's 30th Annual Prescott Bush Awards Dinner.

This weekend, former Democratic strategist & author Bob Shrum discusses his experiences advising presidential candidates since 1972. He is a former Democratic strategist and now a Senior Fellow at New York University's Robert Wagner School of Public Service.

This week on Road to the White House, presidential campaign media advisers discuss how they use new technologies and communications tools to raise money and gain supporters. This is part of an event hosted by the web search engine Google, it's affiliate YouTube and the National Journal.

PBS News Hour senior correspondent Judy Woodruff moderates a discussion how political journalists have adapted to changes in technology and strategy on the presidential campaign trail. Panelists include TIME Magazine's senior political analyst Mark Halperin, the Washington Examiner's online editor Katherine Ham, the Politico's video blogger, former Hillary Clinton spokesman Phil Singer and former Mitt Romney spokesman Kevin Madden.

Mike Allen, chief political correspondent for The Politico takes a look back at the 2008 presidential primaries. Starting 18 months ago with the campaign announcements to the last primaries in South Dakota and Montana that secured the Democratic nomination for Sen. Barack Obama (D-IL). We also look at how Sen. John McCain (R-AZ) was able to lock up the Republican nomination only a few months after debt and staff turnover almost derailed his campaign.

Sen. Barack Obama made a campaign swing through South Dakota on Sunday, stopping at a pancake breakfast for veterans in Sioux Falls followed by a rally outside the Corn Palace in Mitchell. South Dakota and Montana hold the final primaries of the 2008 presidential campaign on Tuesday. Then, Sen. Hillary Clinton celebrates her win in Sunday's Puerto Rico primary with a rally in San Juan.

The National Libertarian Party held its convention in Denver, Colorado, this weekend. They chose Fmr. Rep. Bob Barr (R-GA) as their presidential nominee. Watch highlights of the convention on "Road to the White House."