We're getting a reminder here of how fiercely competitive this race is. Even as his party's convention is going on, Mitt Romney, campaigning in Indiana and President Obama, of course, not taking the week off - as rival candidates sometimes do during the opponent's convention. He's been making his case the last couple of days in college towns, trying to energize young voters.
And NPR's Scott Horsley is on the road with the president.
Now, as Isaac moves north from Louisiana, it could affect other parts of the country, and we'll be following that story as it develops.
The other big story we have been following this week is the Republican National Convention in Tampa, Florida. Today is the final day, and it's an important one for GOP presidential nominee Mitt Romney. He'll officially accept the nomination this evening. Yesterday, Romney took a break from the hubbub of the convention to do a little campaigning elsewhere. NPR's Ari Shapiro reports on his getaway.