This may make for a nervous Tuesday night in Chicago for President Obama.
Just as the polls for the last three days hinted that the President was holding a narrow but resilient lead in the key battleground states, new surveys have been released a short time ago.
These new polls suggest that states the President was supposed to be easily ahead in - like Michigan and Pennsylvania - may be very tight.
If that data is supported by other indicators in the next 36 hours, that's a major worry for the President and his top strategists.
Watch Robert Moore's report:
Here are the latest figures:
Michigan: Romney 47%, Obama 46% (Foster McCollum)
Ohio: Obama 50%, Romney 48% (Columbus Dispatch)
Pennsylvania: Obama 47%, Romney 47% (Susquehanna)
Pennsylvania: Obama 49%, Romney 46% (Morning Call)