Did Booth want Johnson to be president?

[JMadonna]

Just spitballing here.

There is no physical evidence to show that Andrew Johnson was ever a target for assassination. All we have is testimony from Atzerodt that Booth ordered him to do so around 7:30 that night and that he refused to do so.

Surely, Booth knew enough about Atzerodt's character to know that he'd refuse. So was this just a hoax being perpetrated to give Johnson cover and that he was designated to be the prime beneficiary of the assassination?

The South could have had no greater friend than Johnson in the White House at this time.

Possible? Probable? or somewhere in between?