Oh, I dunno.
It's true that generally a rough ruddy complexion as that currently possessed by the Impeached One is a symptom of heavy drinking, but not necessarily always. Some people are just born with that sort of complexion, or with a complexion that as one ages, develops that way.
On the flip side of the coin, the Bostonian Drunkard boasts a soft, flaccid, greasy, pale-white complexion, and there's no doubt the alcoholic credentials of the Bostonian Drunkard.
The Bostonian Drunkard betrays much in his boryborygmia, his constant involuntary flatulence--he's not anybody one would like to sit next to, on an airplane--which usually but not always is another symptom of alcoholism, although not as often as with this ruddy complexion thing.
The skumbag primitive, the IanDB1 primitive, the magnanimous non-benefactor, the inventor of that really stupid SUPPORT THE TROOPS ribbon, the rectal aperture who holds his vehicle together with Hate-filled bumper-stickers, similarly is afflicted with boryborygmia in real life, but one can't determine for sure if he's an alcoholic or not; only that one doesn't want to be downwind of him.