Bernie Sanders looks to prove minority appeal in Nevada

Democratic presidential candidate Bernie Sanders will test his appeal with minority voters in Nevada today, looking to puncture rival Hillary Clinton's argument that he is a one-note candidate whose support is limited to mostly white states.
After routing Clinton in New Hampshire and finishing a strong second in Iowa, states with nearly all-white populations, Nevada's Democratic caucuses give Sanders his first chance to prove he can win over black and Hispanic voters and compete nationally as the race moves to states with more diverse populations.
Republicans in South Carolina also vote on Saturday in the state-by-state contest to pick nominees for the Nov. 8 election, with opinion polls showing front-runner Donald Trump trying to solidify his spot at the top of the pack and rivals Ted Cruz and Marco Rubio fighting for a second-place finish.
Behind them, Republican candidates Jeb Bush, John Kasich and Ben Carson could be vying in South Carolina to keep their campaigns alive before the presidential race rapidly picks up steam in March when dozens of states hold nominating contests.

The long day of voting begins in South Carolina, where polls open for Republicans at 7 a.m. EST...