I realize this board is not really representative of the electorate at large but Haley voters voting Dem is not all that rare. First off the Dems have an actual staffed position titled the National Republican Engagement Director. There was a PAC (PIVOTPAC) which was originally known as Haley voters for Biden and has raised over $400,000. They made a huge ad buy on Facebook the same day Haley dropped out, so it's reasonable to assume that formed much of the impetus for Haley's continued support in the later primaries...
Now they're engaged in a huge back and forth with Haley, as she sent them a cease and desist order (which they have so far ignored) becuase they changed their name to Haley voters for Harris once Biden dropped out. Not only are these folks by and large ex-Haley voters. But they have contributed $$ to show their support. $400,000 to Biden, and that number will likely grow under Harris. And for those who will cynically try and claim these are "just Democrats", let me point out that $$ raised by PACS is a lot more restrictive in terms of how it can be used in a campaign. If they were Democrats they could have just contributed the money directly to the campaign where the candidate has virtual carte blanche on how they choose to spend the money...