The chart above is from The Texas Tribune. It shows the results of The Texas Tribune / University of Texas Poll on Democratic support for a candidate to face John Cornyn in the U.S. Senate race. It was done between January 31st and February 9th, and has a margin of error of 4.09 points.
It shows that veteran M.J. Hegar has slightly increased her lead in the race, but still only commands about 22% support. That's significantly more than her numerous opponents, but far from enough to give her the nomination.
It is likely that there will be a run-off election in this race. Hegar will probably make the run-off, but her opponents are all too bunched together to determine who her run-off opponent will be.