If you want them out you MUST vote for both of them. Just voting once for one of them will not secure success. It doesn't matter who you want out first, vote for them both... LOTS OF TIMES.
If you only vote for one then it sort of cancels the other one out as their votes will be split against the ones that are only voting for Sam.
If you only vote for one then it sort of cancels the other one out as their votes will be split against the ones that are only voting for Sam.