Is there any timetable when Sinema finally makes a decision? Wikipedia just says she filled paperwork, though that's not necessarily a confirmation of a campaign. I find it hard to believe one can be delusional enough to believe there's a shot to win. And any campaign staffer/pollster telling her there's a bath isn't worth his money.
IIRC it's pretty hard to get on the ballot as an indy, so I assume Sinema's decision will come down to if she thinks she can make the ballot. She's arrogant enough to think she could win but not dumb enough to run if it looks like she can't even make it on the voting ballot.