"US Blues" by Robert Hunter, Jerry Garcia. Sung by Greg Vanderlaan Guitar, Vocals

https://youtu.be/k0_kSJTnWNI

This song has a lot of half step - step downs...
all through all the verses.

US BLUES:
A                      A Ab A                                 A Ab A
Red and white,               blue suede shoes
 A                     A Ab A                              A Ab A
I'm Uncle Sam,              how do you do?
D                 D Db D                        D Db D
Gimme five,              I'm still alive
 D                  D Db D                              E B E
Ain't no luck,               I learned to duck
A                         A Ab A                         A Ab A
Check my pulse,              it don't change
 A                          A Ab A                               A Ab A
Stay seventy-two               come shine or rain
D                     D Db D                     D Db D
Wave the flag,              pop the bag
D                    D Db D                      E B E
Rock the boat,             skin the goat

[CHORUS]
B7                                  E
Wave that flag, wave it wide and high
B7                                  E
Summertime done, come and gone, my oh my

 A
I'm Uncle Sam, that's who I am

Been hidin' out in a rock and roll band
 D
Shake the hand that shook the hand
                              E B E
Of P.T. Barnum and Charlie Chan
[CHORUS]

 A
Shine your shoes, light your fuse
 
Can you use them ol' U.S. Blues?
 D
I'll drink your health, share your wealth
                            E B E
Run your life, steal your wife
[CHORUS]

A
Back to back, chicken shack
   
Son of a gun, better change your act
D
We're all confused, what's to lose?
                                 E B E
You can call this song the United States Blues
[CHORUS]