Support for U.S. Senator Elizabeth Warren rose more than that of any other Democratic presidential hopeful over the past month. That is according to the Reuters/Ipsos poll, solidifying her status as a top contender behind Joe Biden and Bernie Sanders. The Sept. 9-10 poll found that 11% of Democrats and independents said they would vote for Warren in their state’s nominating contests. That is up 3 percentage points from a similar poll that ran Aug. 1 to 5. Twenty-two percent said they backed Biden, the former vice president who has been the Democratic front-runner since he entered the race this year, and 16% said they would vote for Sanders, a U.S. senator. Biden’s support was unchanged from the previous Reuters/Ipsos poll, while Sanders dropped 2 percentage points. Biden, Sanders and Harris will square off with seven other Democratic candidates on Thursday at a nationally televised debate in Houston. The Democratic contenders are vying for the right to take on Republican President Donald Trump in the November 2020 election.