I think Cornyn will pull it out, with Trump wining Texas by 0.5-3 % and Cornyn running about 2 points ahead of him.
Ernst should be embarrassed to be running behind Trump. Just a few years ago she seemed like she would be a formidable incumbent.
Did Ernst ever seem like a formidable incumbent? She was expected to be a terrible incumbent when she won in 2014. The only reason she was expected to do well is because of Iowa's R trend, but Biden seems to be doing well enough nationwide and in the Midwest to overcome that.