Landrieu is toast; a Democrat running in a Blue state. Look at the 2016 races and there is not a single Democrat up for re-election in what can be considered a conservative state. And the Republicans can’t tie them to Obama; it’s a presidential election year. At the same time there are at least 5 Republicans running in states that will likely go Democrat so their chances of reelection aren’t that great. So you’re not going to see any groundswell of opposition to Obama. The Democrats won’t need to.
But even so, they are still nervous as hell.