Nearly a third of Democrats and Democratic-leaning independents — 31 percent — said they supported Sanders when asked whom they would vote for if they had to decide today. Another 19 percent of left-leaning voters said they backed Bloomberg, who only officially filed to run for president in November, and skipped the first contests in Iowa and New Hampshire. In those weeks, however, Bloomberg launched an estimated $300 million ad campaign, with plans to spend exponentially more.

In the poll, Sanders and Bloomberg were followed by former Vice President Joe Biden, who notched 15 percent, and Sen. Elizabeth Warren, D-Mass., with 12 percent.