Rise of the independents?

Angus King Jr., senator from the great state of Maine, is a sensible fellow who walks around the nation’s capital with a perpetually perplexed look. One assumes he’s deciding which of America’s two major political parties is vexing him more on any given day. Usually, it’s Republicans, though not always.
King ran for Senate in 2012 as an independent. Once in office, he decided to “caucus” with the Democrats. In Capitol Hill parlance, this means he hob-nobs with