>SNIP>
>>Sometimes a plurality will do it. It depends on whether you have more than 2 candiates for an office. At the federal level, it is overwhelmingly Republican and Democrat. Therefore, a majority of those who vote will do it.
>
>In the last federal election in the U.S. you had the Libertarian Party, the Green Party and the Reform Party in addition to the two traditional parties.
>I've gotta believe that many seats were won with a plurality in that election.
>

Perhaps at the state level. At the federal level, there are two independent senators I believe. For the most part, the largest group speaking with a single voice gets their candidate elected.