Is it legal to serve as Governor and Senator at the same time?
It's clearly not legal to serve as both simultaneously, but Lake is only governor in her own imagination. (BTW, Arizona only allows governors to retain their governorship while running for US Senate if said governor is running during the final year of the gubernatorial term.)
On another note, in the event a sitting governor gets elected to the US Senate but the expiration of the gubernatorial term is later than the date of the senatorial inauguration, the governor must officially relinquish the governorship before being seated as Senator.