Google that and you'll see they've had trouble with this same IP addr in the past.
Eg, partway down the first google results page is this from last November:
congress-edits on Twitter: "Internship Wikipedia article edited ... Nov 9, 2017 - Is it just me, or does it seem that the 143.231.249.130 IP address is getting a workout lately, publishing BS entries in @Wikipedia ?
Probably an intern, based on the above.
So the US House IT teams have had since at least last Nov to deal with this inside-job rogue, but I guess they need more time to figure it out, eh?
Perhaps the problem is they gave it to the FBI to investigate?
Well the crack Awan brothers aren’t on the job anymore.