On page 12 there is a discussion regarding the types of post-employment restrictions that former Members of the U.S. Senate face. Interestingly, former Members are to refrain from communicating with current Senate Members, officers, or employees of either the Senate or the House, or employees with any other legislative office of Congress "with the intent to influence official action on behalf of anyone else for two years after leaving office."
Well, I don't know who all the former Members of the U.S. Senate are, but that's what the Wikipedia List of Living Former US Senators is for. As you may have already guessed, I've looked at some of the most recent former Senate Member's Twitter pages.
I've noticed that a few Twitter pages have been left to die after the Member's campaign loss or retirement and other accounts continue to get used. That "continued use" part is what interests me. It turns out that, yes, "continued use" can mean just what the Senate's post-employment restrictions were meant to protect against.
So far I've found one former U.S. Senator, Jim DeMint, that I noticed was disregarding the "do not contact" rule. Senator DeMint was in office from 1/3/05-1/1/13. That means if between 1/1/13-1/1/15 he has used social media to post anything on behalf of anyone else in order to influence official action and it is addressed to a current Senate Member, officer, etc. then DeMint is in violation of the Senate post-employment restrictions.
You can visit him on Twitter at @JimDeMint and see for yourself, but here are some highlights with links included: