Democrats and Democratic-leaning independents say they prefer former Vice President Joe Biden and Vermont Sen. Bernie Sanders over the rest of the Democratic field just ahead of Sen. Elizabeth Warren.

The talks showed deep divisions, as small countries highly vulnerable to rising seas and powerful storms were at odds with wealthy, high-emitting countries like the United States.

Rep. Jeff Van Drew's decision to join the Republican ranks illustrates the challenging political calculus facing moderate Democrats who represent swing districts ahead of the impeachment vote.

Iowa is more than 90% white. But the state's demographics are slowly changing, and the 2020 campaigns have expanded their efforts to court Latino, Asian and black voters there.