He is found by a submarine (sub duty is where they put undesirables, so when they find Cap, they all want to kill him because they think he's just like the other Cap). He proves his worth to them and they sneak him back to New York City where Cap hooks up with the underground (including Snap Wilson, Spider-Man and Nick Fury).
They make a bold attack on the evil Captain America's speech at a big event (how amazing of a job did Simons do on Buscema's pencils here?)...
The evil Cap gets beaten pretty easily by the real Cap, with a notable point being when the real Cap's shield destroys the fake Cap's shield.
Cap then gives a rousing speech....
Listen to me -- all of you out there! You were told by this man -- your hero -- that America is the greatest country in the world!
He told you that Americans were the greatest people -- that America could be refined like silver, could have the impurities hammered out of it, and shine more brightly! He went on about how precious America was -- how you needed to make sure it remained great! And he told you anything was justified to preserve that great treasure, that pearl of great price that is America!
Well, I say America is nothing!! Without its ideals -- its commitment to the freedom of all men, America is a piece of trash!
A nation is nothing! A flag is a piece of cloth! I fought Adolf Hitler not because America was great, but because it was fragile! I knew that liberty could be snuffed out here as in Nazi Germany! As a people, we were no different than them! When I returned, I saw that you nearly did turn American into nothing!
And the only reason you're not less then nothing -- -- is that it's still possible for you to bring freedom back to America!
When they turn to HIM as their new leader, he quickly tells them to look elsewhere...
Powerful stuff from a fairly unlikely source (What If...? comics weren't exactly known for their political stories).
Okay, folks, I'm sure you have suggestions for good political storylines from the "good old days when comic books weren't political," so drop me suggestions at email@example.com!