If you play jazz, then you play with your fingers. If you're playing rock, you use a pick. There's really no rhyme or reason to that other than that's just the way it has been.
“President Obama stands ready to work with everyone, because that's what the American people expect and deserve - not for the short term political advantages, but the long term health of our country. We don't spend time trying to figure out what's in the minds of Republicans, we try to keep our focus”