Introduced by Corzine as "our greatest president in this 21st century," Obama stuck up for the embattled Democratic governor, saying Corzine had been "tested by the worst recession in half a century"
That is a bit misleading considering that there has been only two presidents so far this century, and Obama, himself, has only been in office for six months. So, there isn't much of a track record to compare to Bush accurately.
This is a bit risky for Corzine because he is in a tight battle with the Republican Christopher Christie. In fact, Christie has been leading most of the polls recently even though New Jersey is generally heavily Democratic and virtually unwinnable for the GOP in statewide elections. Obama's personal popularity is still high, but his job approval numbers have plummeted and policy approval ratings have mostly tanked as well. So, Obama it could end up hurting in the long run, if Obama's numbers continues to drop like a stone like they have over the last few weeks.