Did Barack Obama Plagiarize Aaron Sorkin?

Here was one of the president’s lines from last night that’s getting repeated ad nauseam today:

’I’m no longer just a candidate, I’m the President’

And there’s this line from the Aaron Sorkin–scribed The American President:

This is a time for serious people, Bob, and your fifteen minutes are up. My name is Andrew Shepherd, and I *am* the President.

Just words, I guess.