Not OP but I'll put it in context. Former Presidents may be indicted for crimes crimes committed during their time in office. Bypass impeachment altogether. Obama doesn't have to be impeached first. Which is probably what they'll argue.
Here's a source for the Beto story. Sounds like it was allowed. Straight from the post commander.
https://thefederalistpapers.org/opinion/robert-beto-orourke-rents-vfw-hall-rally-asks-flags-taken
Why did I have a feeling this was coming? Ho-hum I wonder why you'd wanna impeach POTUS and his successor when Pelosi "will be" third in line? You now after "the blue wave."
Maxine Waters vows to 'get' Pence once Trump impeached
Rep. Maxine Waters promised a crowd of young Democrats over the weekend that she would go after Vice President Mike Pence once President Trump is removed from office.
The California congresswoman accepted a lifetime achievement award from the Stonewall Young Democrats on Saturday in Los Angeles, telling the enthusiastic crowd that Mr. Trump threatened Americans’ way of life and deserved to be impeached.
https://www.washingtontimes.com/news/2018/sep/10/maxine-waters-vows-get-pence-once-trump-impeached/