From Polling Report, two polls conducted by Lake Snell Perry & Associates on behalf of America Coming Together.
Between August 26th and 29th, a poll of 600 Likely Michigan Voters, MoE ± 4%:
Kerry 51
Bush 43
Nader 1
Unsure 5
Between August 24th and 29th, a poll of 485 Likely Wisconsin Voters, MoE ± 4.5%:
Kerry 50
Bush 44
Nader 1
Unsure 4