First click this graphic to follow all US delegate races at Nate Silver's Fivethirtyeight site. The interactive graphic, one for each presidential candidate, shows each one's progress, noting every caucus and primary date, how many votes are at stake and a calculated capture number per state per candidate needed to win the nomination. Second, click to the Horse Race live blog at Breitbart which links every few minutes from about 8 a.m. EST to breaking US election stories from all over the map. Except for opinion pieces and voting night tallies, you may not need anything else to stay on top of the news.
The Fivethirtyeight home page adds vote junky anlaysis to the stories you read on an election night.
The sample below is from the interactive graphic for Donald Trump, highlighting what's at stake for him on March 15th.