"Push It" is our first modal progression in the key of E, consisting of two chords: the I chord and the II minor chord. The chords specifically are E - Esus4 - F#min7(add4). The tonal center of this progression (where the resolution occurs between the chords) is E.
There are some nuances to make this progression more interesting: using the Esus chord to add flavor and movement, pushing into the F#min(add4) chord on the fourth beat, and using a nice little sixteenth note riff as a turnaround to the beginning of the two bar phrase. Let's take a listen and learn this little gem. Once you have it down try soloing over it using the E major scale.