So, in terms of the main storyline I'm stuck on "For the Republic, Part 2". The reason for this is because my other mission paths led me to the mission where you have to save the President on his visit to Hoover Dam.

Well, I recently spoke with the Colonel, and......she wants me to save the President on his visit to Hoover Dam. Of course the game doesn't give the option to say "I already did".

If it was possible I wouldn't mind doing the mission again, but ever since then that Sergeant that you have to speak to before the mission starts freezes in place, looking out at the podium, and it says "X) Talk to Sergeant So-and-So", but you can't actually initiate conversation with him. He just stands there.

So, as it stands, I cannot continue the main storyline. Does anyone know if I can fix this?