Robert Rubin, who served as treasury secretary during the Clinton administration and is currently the chairman of the board of directors at Citigroup, evaluates the state of the U.S. economy and the role of government intervention in recent economic troubles.

In an in-depth interview, Sen. Barack Obama weighs in on the current U.S. economic crisis, the war in Iraq, issues of race and gender and his run for the Democratic presidential nomination. Obama also looks ahead to next month's contest in Pennsylvania against Sen. Hillary Clinton.

Sen. Hillary Clinton told the NewsHour Wednesday that she remains optimistic about her chances in next week's Texas and Ohio primaries as she battles Sen. Barack Obama for the Democratic nomination. Clinton details her campaign outlook and the prospects for a general election race against presumptive GOP nominee John McCain.

Sens. Joseph Biden, D-Del., and Chuck Hagel, R- Neb., recently traveled to Pakistan, Afghanistan, India and Turkey in an effort to review the state of security and U.S. diplomacy in the critical regions. The lawmakers assess U.S. relations in South Asia and the recent Turkish incursion into northern Iraq.

Despite pressure from Serbia and Russia, the province of Kosovo declared itself independent from Serbia on Sunday. Ambassador Frank Wisner, the U.S. special envoy to Kosovo, discusses the implications of the Albanian-majority province's declaration of independence.

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