Former Vice President Joe Biden picks up 4 points, is first choice for 35% of respondents, compared with 27% who backed Sanders.

Sens. Bernie Sanders, Kamala Harris both saw bigger gains in the week that they formally launched their campaigns.

8% of Democratic primary voters named Beto O’Rourke their first-choice candidate for the Democratic presidential nomination, up 1 percentage point from the previous week.

Beto O’Rourke, who launched his campaign for the Democratic nomination for president Thursday, is being hailed for his grassroots might after his campaign said it raised $6.1 million on his first day as a candidate, the biggest first-day haul of the current field.

But the immediate response from Democratic voters across the country paled in comparison with some of the party’s other high-profile contenders for the nomination, such as Sens. Bernie Sanders of Vermont and Kamala Harris of California.

According to Morning Consult’s latest Democratic primary tracking poll, 8 percent of Democratic primary voters said O’Rourke is their first choice for president, tying him with the Californian and putting him well behind the Vermont independent. O’Rourke’s figure is up 1 percentage point from the previous week.

O’Rourke’s share of support at this early stage in the race has hardly moved outside the margin of error of 1 percentage point since Morning Consult began tracking Democratic voters’ views in January. Eight percent of primary voters called him their first choice at the time and 9 percent called him their second choice, which is identical to the latest poll.

O’Rourke announced his candidacy midway through the March 11-17 poll of 13,551 Democratic primary voters, but 57 percent of the responses were collected on or after O’Rourke’s March 14 announcement.