Trump appears to have supported Obama in 2008 and left the democrat party in 2009, becoming a republican, he left republicans and then rejoined the party in 2012.
I’m guessing that Kari Lake has made a real switch and may be very interesting to watch, I anticipate her being a firebrand governor.
She was 34 when she though Kerry was great and 38 when she started supporting Obama, it wasn't a youthful indiscretion.