From the most recent NY Times/CBS Poll (dated 4/27/04):

9. If the 2004 Presidential election were being held today, and the candidates were John Kerry, the Democrat, and George W. Bush, the Republican, and Ralph Nader, would you vote for John Kerry, George W. Bush or Ralph Nader?

3/30-4/1/04: Kerry 48%, Bush 43%, Nader 1%

4/23-27/04: Kerry 41%, Bush 43%, Nader 5%

It is still May and we have six more months until the election, but that makes me very nervous.