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(CNN)—President Bush sent an urgent demand to Congress Monday telling them they must vote within 90 days on a controversial free trade agreement with Colombia - but a majority of Democrats are in opposition to the agreement, including presidential candidates Hillary Clinton and Barack Obama.

In the latest installment of CNN=Politics Daily, Senior Political Correspondent Candy Crowley reports on the candidates’ opposition to the bill and how the issue led to the resignation of Clinton’s top strategist, Mark Penn.

One day before General David Petraeus and Ambassador Ryan Crocker are set to testify on Capitol Hill over progress in Iraq, presumptive Republican nominee John McCain is again blasting Obama and Clinton for their troop withdrawal proposals. CNN’s Mary Snow reports from the campaign trail in Missouri on McCain’s remarks.

The Arizona senator also Monday that speculation surrounding Condoleezza Rice as his potential vice presidential running mate is news to him. Senior Political Analyst Bill Schneider explains where the speculation came from and what it could mean for McCain’s presidential run.

Finally: with less than three weeks to go before Pennsylvania’s April 22 primary, new polls show Obama seems to be gaining on Clinton in the critical state. CNN’s Dan Lothian has the details.

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