So Simple. So Smart.
On Tuesday night, while results from the Kentucky and Oregon Democrat primaries were coming in, the New York Times had this wonderful tool above the fold on its home page.
Meantime, the folks over at CNN.com offer the considerably more complicated (if subtle) calculator shown below.
Making complex material simple but accurate is one of the highest callings of journalism. Both sites attack this particular complexity well. But I give the nod to nytimes.com.