I'd point out that recall provisions of federal office holders aren't legally enforceable. The Constitution sets the conditions of installation and removal of sitting federal office holders, not the states.
IOW, once someone is installed, the only people who can remove him from office are his Congressional peers. It's a bit of a racket that way.
Even if recall is not possible somehow it just feels better to say the word.
The U.S. was probably better served by Senators chosen by their respective state legislatures,instead of the popularity contests of the past 100 years.