Tuesday’s primary elections, stretching across four Southern states, will continue to test Republican voters’ appetite for former President Donald Trump and his push of the “big lie.”

Nowhere is that more apparent than in Georgia as Gov. Brian Kemp and Secretary of State Brad Raffensperger -- two Republicans who balked at Trump’s requests to overturn the results of the 2020 presidential race -- face challenges from enthusiastic proponents of Trump’s baseless election claims. Kemp is hoping to fight off former Sen. David Perdue, while Raffensperger is looking to rebuff Rep. Jody Hice.

Another high-profile contest in the Peach State will be the Senate primary, where football star Herschel Walker is running for the Republican nomination to likely challenge Democratic incumbent Raphael Warnock. Trump-endorsed Walker has been leading the pack despite several controversies, including prior accusations of domestic violence. (Walker has denied some of the allegations and said he doesn't remember others.)

For Democrats, the most-watched race of the night will be a runoff in Texas’ 28th Congressional District as 29-year-old immigration attorney Jessica Cisneros tries for a third time to unseat nine-term incumbent Rep. Henry Cuellar. The heated primary is the first clear test of how abortion rights may motivate voters this election cycle, given Cuellar’s position as the sole anti-abortion Democrat in the House.

And in Georgia, two Democratic incumbents -- Rep. Lucy McBath and Rep. Carolyn Bordeaux -- are running against each other because of redistricting.