LIVE UPDATES: Arizona Democratic primary full results and vote counts

Samantha Lee/Business Insider

• Polls in the Arizona primary will shut down at 7 p.m. MST on Tuesday.
• Former Vice President Joe Biden has so far won 864 pledged delegates to the national convention in July, leading Sen. Bernie Sanders' 705 delegates.
• FiveThirtyEight currently has former Vice President Joe Biden as the heavy favorite in the race.
• Visit Business Insider's homepage for more stories.

Polls in the Arizona primary close at 7 p.m. MST.

Arizona Democratic primary results:

Catch up on live coverage from the primary:

Pre-primary:

• Going into Tuesday's primaries, former Vice President Joe Biden has won 864 pledged delegates to the Democratic convention in July, leading Sen. Bernie Sanders' 705. 1,991 delegates are needed to secure a majority and the nomination without a potentially contested convention.
• During Sunday night's debate, Biden pledged to select a woman as his running mate should he win the nomination.
• Biden's commanding lead in recent primaries suggests that the Democratic electorate is more focused on beating Trump than in Sanders' proposed ambitious democratic socialist platform.
• Tuesday's primaries come amid a growing coronavirus pandemic. Louisiana announced on Friday that it would be postponing the Democratic primary there, originally scheduled for April 4, for over two months.

Here's how Democrats will elect their presidential nominee over the next several months

What's at stake in the primary?

Arizona's presidential preference election is a closed contest. A total of 78 delegates have been allocated to the Copper State, including 67 pledged delegates up for grabs.

As in most other states, candidates must earn over the minimum threshold of 15% of the vote in a given district or statewide to earn any delegates.

This is what the polling said ahead of the Michigan primary:

FiveThirtyEight's average of the latest polling data has Biden ahead with 55.2%, and Sanders taking 31.8%. Hawaiian US Representative Tulsi Gabbard trails behind with just 1.4%.

And according to FiveThirtyEight's primary election forecast, Biden is currently the favorite in the Grand Canyon state. The site is currently forecasting the former vice president "to win an average of 58% of the vote." FiveThirtyEight gives Sanders a one in 50 chance to win in Arizona.