Donald TrumpWith less than 500 days until the 2016 election, it's time to take a look at who has the best chance of making it to the White House after President Barack Obama.
Reuters/Gary Cameron
There have been surprises (Bernie Sanders, Donald Trump) and the expected (Hillary Clinton, Jeb Bush). 

But with less than three weeks to go before the first officially sanctioned Republican primary debate, it's a complete free-for-all to determine the eventual GOP nominee.
Our rankings are based on the Real Clear Politics averages of national polls and those in New Hampshire and Iowa. We also factor in candidates' fundraising numbers released this week and their momentum (or lack thereof) over the past few weeks.
Here's a look at where all the candidates stand as the campaign begins to officially ramp up.