Youth Support For Obama Plunges

To 48 percent, fueling an 18-month approval rating low for the president

It's a glaring number in a national poll that's making headlines.

President Barack Obama's approval rating dropped 8 percentage points over the past month to 45%, the president's lowest rating in more than 18 months, according to a CNN/ORC International survey released on Monday.

And Obama's disapproval rating soared 9 points to 54% since mid-May.

Even more surprising: The overall decline in his approval rating was partially fueled by a plunge in support from younger Americans, a huge base of Obama's support.