Handyman
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I don't know about NY but for CA a lot of those emigrees are cons who are moving to AZ and TX, similar to Rust Belt Olds moving to FL and AZ. It's not great, electorally.
The cons in Cali are not moving to Texas, as Jim says they are moving to Idaho. But I read an article not long ago that many of the Dems from Northern Cali (San Fran area) are also moving there.
Flo(R)ida aint changing any time soon so if they want to move there let them. Everywhere else you are starting to see some shifts in the electoral voting...maybe not statewide but definitely in various counties.