Take it for what it's worth...
Rasmussen, a questionable polling outfit, has a National Tracking Poll, today's results are:
BUSH 47 Kerry 43
...in a sign the Bush attacks are taking a toll on Kerry, it was:
Mar 17 BUSH-46 KERRY-45
Mar 16 BUSH-45 KERRY-47
Mar 15 BUSH-44 KERRY-46
Mar 14 BUSH-45 KERRY-44
However...
Rasmussen has some new state results:
500 Likely Voters
March 14-16
MICHIGAN
KERRY-48
BUSH-45
OHIO
KERRY-45
BUSH-41
PENNSYLVANIA
KERRY-45
BUSH-44