Obama was an elected official, not a federal employee.
How many federal employees (meaning in or formerly in a federal job, but not elected) have made comments about Roy Moore?
Any employee in the executive branch "may express opinions about candidates and issues".
Look it up. It's in the law and of course such speech is protected by the Constitution.
Yes, but he flew around the country on the taxpayers’ dime campaigning for Clinton. He was not doing the country’s business. All the presidents do some of that, so how is this man justified in trying to cause trouble from one comment by Conway.