With just over 90 days to go in the 2012 presidential contest, both sides are ramping up their efforts to define their rival.

Republican Mitt Romney brought his campaign to President Obama's home base today.

Speaking in Elk Grove, Illinois, he blasted the Obama administration's plan to allow states more flexibility in how they award welfare.

While President Obama introduced a new zinger in his attack on Romney's tax plan.

Rick Santorum and Jeb Bush were added to the list of republican convention speakers in Tampa later this month.

And democrats announced that former President Jimmy Carter will tape a video message that will be aired in prime time at their convention.