His strong showings in Iowa and New Hampshire have further pushed Vermont Sen. Bernie Sanders into the lead for the 2020 Democratic nomination, but as evidence that voters are puzzled with their choices, “not sure” is third.

In the latest Economist/YouGov survey, 30% of Democratic voters expect Sanders to win the nomination. He is followed by former Vice President Joe Biden, at 23%.

Then, “not sure“ comes in at 17%, followed by former New York Mayor Mike Bloomberg at 11%.

“No other candidate reached double digits as an anticipated winner of the eventual nomination,” said the survey analysis.

While former South Bend, Indiana, Mayor Pete Buttigieg has also done well in the two early contests, and leads in delegates, the voters polled aren’t as sure.

The survey said that some voters have difficulty with presidential candidates as young as Buttigieg, and those who do not want to vote for a gay candidate edge out those who do. The former mayor is 38 and gay.