DETROIT, MI (WTVB) - The race for president in Michigan looks like it will come down to the wire.  With Election Day less than a week away, a new poll shows President Obama with a three-point lead over Republican challenger Mitt Romney.  According to a political survey commissioned by the "Detroit News" and WDIV Local 4, President Obama holds a slim 48-percent to 45-percent lead over Romney.  In Metro Detroit, Romney holds a nine-point lead in Oakland County and 16-point lead in Macomb County, while Obama is up 16-percent in Wayne County.