The E major chord has the G# in it, which is not in the key of D major. It exists in the D lydian mode but is more likely to act as a short key change. In modern music keys utilize accidentals (sharps and flats which change key tones) to give the impression that we change keys for a short time and then return to home base. The E major in the key of D is called, among other things, the dominant of the dominant (or 5 of 5, or V of V); the two major; and the major supertonic.

Keys? We don't need no stinking keys.

Mike

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You have to practice improvisation. -Art Tatum

Mike Dunbar Music

You've got to know your limitations. I don't know what your limitations are. I found out what mine were when I was twelve. I found out that there weren't too many limitations, if I did it my way. -Johnny Cash

It's only music.
-niteshift

Mike Dunbar Music