Hillary Clinton has won the South Dakota Primaries, with the NY Times having the totals as follows (updated 6/4/08 with 100% reporting):
Hillary Clinton: 54,179 votes, 55.3%, 8 delegates won
Barack Obama: 43,726 votes, 44.7%, 7 delegates won
With the same % reporting, John McCain wins the GOP contest with 70.1% of the vote (Ron Paul finished [...]

We’ll have an update once SD and MT’s results are in, but unless something extraordinary happens between now and the conventions, it’s as close to official as you can get: Senators John McCain (R-AZ) and Barack Obama (D-IL) are the two major party candidates in the race to be 44th President of the United States… [...]

According to the Associated Press, Illinois Senator Barack Obama “effectively clinched” the Democratic Presidential nomination today, based on a tally of pledged delegates, superdelegates and the minimum number of delegates he will add to his total today even if he loses both Montana and South Dakota Primaries. Here are the first few paragraphs of [...]