Did it give you a result leading directly to their canonical campaign website? I can see Sanders and Clinton with international, but can't see DeSantis nor any other Republican candidate (not even Pence).
I can definitelly see pages with lists of candidates, but I couldn't find a single one that would also link their websites and thus satisfy the query, at least indirectly.
The results seem to change as we speak. I no longer have any republican candidates on the first page of search results, but the links in the results are to the canonical campaign sites.
I can definitelly see pages with lists of candidates, but I couldn't find a single one that would also link their websites and thus satisfy the query, at least indirectly.