MJ Hegar has widened her lead over her rivals for the Democratic nomination to the U.S. Senate, but sheโ€™s one of a dozen candidates in that Texas race who remain strangers to a large majority of their primary voters, according to the latest University of Texas/Texas Tribune Poll.

Those widely unknown Democrats are vying for the seat held by Republican John Cornyn, a well-known incumbent who first won election to the U.S. Senate in 2002. Cornyn faces four opponents in the Republican primary.

The large number of candidates almost ensures a May runoff after the March 3 primary, but itโ€™s not clear who might be in it. Hegar had the support of 22% of self-identified Democratic primary voters in Texas โ€” the only candidate with double-digit support. Six candidates were next in line, in a tight grouping that makes it impossible to say for sure whoโ€™s in second place. With support ranging from 5% to 9%, that group includes Cristina Tzintzรบn Ramirez, Chris Bell, Amanda Edwards, Royce West, Annie โ€œMamรกโ€ Garcia and Sema Hernandez.

The rest said they preferred one of the five remaining candidates or โ€œsomeone else,โ€ or they refused to say who theyโ€™d vote for.

โ€œThereโ€™s going to be a runoff, and Hegar is candidate one. But there is a six-car pileup for No. 2. Who knows who No. 2 is?โ€ said Daron Shaw, co-director of the poll and a professor of government at the University of Texas at Austin. โ€œItโ€™s extraordinarily volatile.โ€

Some candidates did better than others when voters were asked which contestants theyโ€™ve heard of, but the biggest problem for the whole field is that most voters havenโ€™t heard of any candidates. Hegar was the best known, with 31% saying they have heard of her. Put another way, 69% of the people who said theyโ€™ll vote in the Democratic primary havenโ€™t heard of the best-known contestant.

Bell was next, at 23%, followed by West (19%), Tzintzรบn Ramirez (16%), Hernandez (13%), Edwards (11%) and Michael Cooper (10%). The rest of the candidates were known to fewer than one in 10 Democratic voters.

In the initial question about how they would vote, 56% of Democrats didn’t express a preference. That leaves some uncertainty about who might make a May runoff. โ€œYou still have a huge chunk of Democrats who have not been paying attention to this race,โ€ said James Henson, director of the Texas Politics Project at UT-Austin and co-director of the poll.

The University of Texas/Texas Tribune internet survey of 1,200 registered voters was conducted from Jan. 31 to Feb. 9 and has an overall margin of error of +/- 2.83 percentage points, and an overall margin of error of +/- 4.09 percentage points for Democratic trial ballots. Numbers in charts might not add up to 100% because of rounding.

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Ross Ramsey co-founded The Texas Tribune in 2009 and served as its executive editor until his retirement in 2022. He wrote regular columns on politics, government and public policy. Before joining the...