Former New York City Mayor Michael Bloomberg leads Massachusetts Sen. Elizabeth Warren in a national poll, reflecting his rise amid vast campaign spending and her fall after touting a Medicare for All healthcare program.

The Hill-HarrisX survey, from Jan. 20 to 22, shows Bloomberg at 11% and Warren at 9%. Support for Bloomberg’s campaign grew approximately 4% this month while Warren’s fell 2%, reflecting her decreasing momentum seen in other polls.