Joe Biden solidified his hold on the Democratic nomination, adding to his delegate lead with big wins in Florida, Illinois and Arizona.

Joe Biden solidified his hold on the Democratic presidential nomination, winning a pivotal victory in Michigan, which was once seen as a potential source of strength for Bernie Sanders.

The Democratic Primary took a dramatic turn Tuesday, with Joe Biden winning at least eight states to continue his comeback story. At the same time, Bernie Sanders took home at least four states, including a win in delegate-rich California to set up a showdown between the two in the primaries ahead. Maine and the key state of Texas remained extraordinarily close.

Former Vice President Joe Biden notched his first win of the Democratic primary season in South Carolina, cruising to victory thanks to strong support from black voters and a boost from late-deciding voters. Vermont Sen. Bernie Sanders placed a distant second with political newcomer Tom Steyer third.

Vermont Senator Bernie Sanders won the New Hampshire Democratic Primary, holding off a strong challenge from former South Bend Mayor Pete Buttigieg. The two were also atop the leaderboard in last week’s Iowa caucuses.

As the Iowa Democratic Party continues to count the results of the first-in-the-nation caucus, the Fox News Voter Analysis – a poll of nearly 3,000 likely caucus-goers – provides important insight into voters’ views as they headed to caucus sites across the state. These results represent voters’ initial candidate preferences, and the state’s complicated caucus system means the final results may well differ from this data.

In an election reflecting the country’s deep partisan divide, voters across America handed the keys to the House of Representatives to the Democrats, while Republicans took advantage of a favorable Senate map to expand on their majority in the Senate.