Hawaii Republicans will have their first binding presidential caucus this year, and remaining candidates Mitt Romney, Newt Gingrich, Rick Santorum and Ron Paul are all angling to pick up delegates.

In the past, party leaders in Hawaii would select the state's delegates to the national convention. Hawaii, Barack Obama's home state, has gone Democratic in nearly every presidential election since statehood.

This year, Hawaii Republicans have done away with straw polls and a more convoluted system to hold a transparent, binding and closed caucus, meaning only registered Republicans can vote. State party Chairman David Chang hopes that the move will energize GOP supporters and build up party membership.

It's certainly caught the Republican candidates' attention more than any GOP event in Hawaii in years.

Although none of the candidates have made a campaign stop in the islands, three of them -- former Massachusetts Gov. Mitt Romney, former Pennsylvania Sen. Rick Santorum and Texas Rep. Ron Paul -- have sent members of their family to the distant island state.

Santorum's daughter Elizabeth, Romney's son Matt and Paul's son Ronnie all held campaign events over the weekend and on Monday and Tuesday, reaching out to undecided voters on school campuses and holding conference calls with Hawaiians to ask for their support. The Paul campaign also paid for TV airtime, while Santorum paid for a robo-call to voters.

Newt Gingrich, meanwhile, looking to score big in Mississippi and Alabama on Tuesday night, nonetheless made several trips with his wife to the islands earlier this year, and reportedly sent out a letter last week asking the state's Republicans for their support.

It's very exciting, Chang told Fox News on Monday. The three campaigns are generating a lot of buzz from voters who might not otherwise have known much about the candidates.

Find out when to look for the results of the 2012 Hawaii Republican caucus, where to watch on TV and online and how to follow the race on Twitter, below.

What's At Stake:

Twenty of the 116 delegates up for grabs Tuesday will come from Hawaii, three of whom will be Republican National Committee members who can support any candidate at the August convention. The remaining 17 will be divided proportionally based on how much of the vote each candidate receives across the state.

When To Start Watching:

Caucuses will be open for two hours on Tuesday, from 6 to 8 p.m. local time (11 p.m. to 1 a.m. EDT). State party officials say results should begin coming in around 10 p.m. and should be complete around midnight local time (5 a.m. EDT).

Where to Watch Results Live:

Hawaii News Now will have updates of the GOP 2012 caucus results throughout its nightly programming. ABC's KITV will be be providing updates. Links to live feeds for the primaries tonight in Mississippi, Alabama, Hawaii and the American Samoa can also be found at Right Speak, a conservative blogging site.

Where to Get Results Online:

Both POLITICO and Google will be providing minute-by-minute live updates for the first-ever Hawaii Republican caucus, with information on which counties are reporting, what percent of the votes are in and which candidate is currently in the lead.

How to Follow Results On Twitter:

Search for the hashtag #HIcaucus to follow the conversation about Tuesday's GOP event on Twitter.