Can you recall a US Senator?
State Senator, yes, but a Fed?
the site is senatorflake.com. the az justification is cited there. it looks like the person running the site is still trying to get approval from AZ for his petitions or find someone who already has one.
without petitions to distribute to sign, it looks like the effort is on hold.
no visible contribution button, i guess by design. i would contribute though, being out of state.