I do not play by ear so I'm sure some of these chords are a bit off. I watched the 
video of him playing behind the scenes at the White House. 
It is a lot 
of barre chords so it isn't very easy to play. It sounds ok on an acoustic but it sounds 
better on electric. And I'm sure it would sound
 better on 
an ES-335. Sorry this isn't the most organized tab but it is better than nothing i 
hope. THE CHORDS ARE NOT IN THE RIGHT POSITION. 
The chords
just go with whatever lyrics are under them. 
Just try and figure out when to switch chords by yourself. It's not hard! Enjoy!

-Brendan

The fill he does at the beginning is an open A string and then A string 3rd fret.

Intro
G (320003@1) Bb (x1333x@1) C (x32010@1) D (xx0232@1) GmVerse: (355333@1)Bb (x1333x@1) F (133211@1) C (x32010@1)F (133211@1) Gm (355333@1)Darkness hides the faces  of we who hold the power. We don't need to be rich
We only need to be free

Bb (x1333x@1) F (133211@1) Am (x02210@1) Gm (355333@1)Chains of oppression
Never gonna break
But a day will come when we hold the key

Bb (x1333x@1) Gm (355333@1)Bb (x1333x@1)GmC5

Time will remind us
That the people still have a choice
And we don't want violence
Until there's no other choice

Chorus:

Gm (355333@1)Gm (355333@1) Bb (x1333x@1) GmC5 Gm (355333@1)But the river's gonna rise
Wash our struggles away
The sun is gonna shine
Shine down on a brand new day

Bells will be ringing
Flames reaching to the sky
Higher and higher
Fueled by the winds of change
Sweet taste of freedom
Fresh on the tips of our tongues
And the dust of the past is all that shall remain
Echoes of our voices
Ringing all through the town
Will drown out the memories
Of the days when we were bound

Chorus