https://i.redd.it/xvukc8ucjptx.png

http://archive.is/UMNYv

Also, since they deleted it from their page, here is a backup of the poster's page. Scroll down, click on the comment that is in the screenshot, and you'll be taken to the exact same place as the screenshot:

http://archive.is/24mg7

Here is a member of that sub confirming that yes, if Hillary wins, they will indeed attack the capital

http://archive.is/jqdkc

"Domestic terrorism" means activities with the following three characteristics:

Involve acts dangerous to human life that violate federal or state law; Appear intended (i) to intimidate or coerce a civilian population; (ii) to influence the policy of a government by intimidation or coercion; or (iii) to affect the conduct of a government by mass destruction, assassination. or kidnapping; and Occur primarily within the territorial jurisdiction of the U.S.