Doonesbury by Garry Trudeau for May 20, 1974
Transcript:
Nixon: Haig, it's about time for my weekly T.V. appeal to the people. Call props and tell them to bring over some more Lincoln visuals - a bust, etchings, anything! Alexander Haig: Mr. President, with all due respect, sir, I think you've just about gone the limit on comparisons of yourself with Lincoln... Nixon: You think so? Hmm, maybe you're right, Al... Haig: It would be the fifth time, sir... Nixon: It's just that I can't get over all the parallels! Haig: It is eerie, sir..
All the pictures of the WH from this time period show some sort of protective emplacement – fences with barbed wire, tanks, guns, etc. It represents the sense Nixon’s sense of being embattled and defensive at that time.