We'll see if anything gets called before the polls close. Arizona can vote until 10 pm local time (yes, that's midnight Eastern), and Utah voters can vote online (!) until 1 am.

We will update here as news emerges...

Election night open thread below...

Update 1: 8:15 PM PDT

MSNBC has called Arizona for Trump, with 47% of the vote. All other races remain too close to call.

Update 1:8:20 PM PDT

AP calls Arizona for Hillary Clinton. At the last update, she was leading 60-38

BREAKING: Hillary Clinton win Democratic primary in Arizona. @AP race call at 11:19 p.m. EDT. #Election2016 #APracecall

— The Associated Press (@AP) March 23, 2016

Update 3: 10:16 PDT

Utah is still too early to call, but Sanders and Cruz have strong leads. There are long lines at the Idaho caucuses as well, no results from there. I'll stay with it until we have something more solid.

Update 4: 10:30 PDT

AP and NBC call Utah for Bernie Sanders.

Update 5: 10:40 PDT

Bernie Sanders had a strong win in Ada County, Idaho, where Boise is.

Sanders wins Boise's Ada County by an 80-20 margin. County was >1/3 of all Dem votes in '08 https://t.co/zKa2jvwvvQ

— Nate Cohn (@Nate_Cohn) March 23, 2016

Update 6: 11:05 PDT

Idaho is called for Bernie Sanders, and I'm calling it a night, folks.

Wednesday Morning

Update 7: Cruz wins Idaho and Utah.