Presidential candidate Jay Inslee was not happy when the Democratic National Committee shot down his request to hold a climate crisis-focused debate.

The perilous conditions migrants coming to the US face captured renewed attention from Democrats running for president on Wednesday, hours before 10 candidates take the stage for the party's first debate in Miami.

Sen. Elizabeth Warren's policy-centric 2020 campaign has widely known as one of the most policy-driven in recent history. CNN's MJ Lee has an exclusive look at Warren's "policy factory."

It's the moment that Democrats have been anticipating since the tearful trauma of Election Night 2016 -- when their campaign to make Donald Trump a one-term President really begins.

The first Democratic presidential debate on Wednesday will have all eyes on Massachusetts Sen. Elizabeth Warren, who -- because of a random draw -- will be the only candidate polling in the top five on the stage.