You know, when I really think about it,

[Mr.Bill]

most of the Democratic nominees I have voted for in general elections were not really my first choice in the primaries. How about you?

[WheelWalker]

1. True for me.

[northoftheborder]

2. True for me also; never picked the primary winner until 2016.

[wyldwolf]

3. Since 1988, three times

'92 Clinton. '00 Gore. '16 Clinton.

Although in '04 Kerry was my early choice, Clark became my fav through much of the process.

(edited to add 2000 election, which almost doesn't seem like a contested primary 20 years later, but was.)