DENVER (AP) — Colorado holds primaries Tuesday to select the top two contenders to succeed Gov. John Hickenlooper, a centrist Democrat whose promotion of aerospace, tech and a plethora of other industries helped generate unprecedented economic growth in this rapidly-growing state of 5.6 million people. But to win, the leading Republican and Democratic candidates are eschewing the middle ground in this heavily independent purple state to appeal to their respective bases.Read more on NewsOK.com