ATLANTA—It took almost two hours Wednesday night for a Democrat to take a shot at South Bend, Ind., mayor Pete Buttigieg, the 2020 field's newest frontrunner in Iowa and New Hampshire. 
Tonight was the night Amy Klobuchar stopped playing coy on the debate stage and started treating her Democratic opponents like she treats her employees. Angry Amy came to play. 
Twelve Democratic presidential candidates will face off Tuesday night at Otterbein University in Westerville, Ohio, site of the fourth Democratic primary debate, hosted by CNN and the New York Times. Here is some unsolicited advice for each of the candidates designed to help them gain the upper hand over their opponents. 
The Democratic debate stage may become more crowded after Rep. Tulsi Gabbard (D., Hawaii) became the 12th candidate to meet the party's polling and donor thresholds. 
Sen. Elizabeth Warren (D., Mass.) again dodged a question Tuesday about whether her Medicare for all proposal would hike taxes on middle-class families. 
Former Rep. Beto O'Rourke (D., Texas) blistered President Donald Trump at Thursday night's Democratic debate as a "white supremacist" who posed a threat to the safety of people of color in the United States. 
Former vice president Joe Biden said during Thursday's Democratic primary debate that "nobody should be in jail for a nonviolent crime." 
Former Rep. Beto O'Rourke (D., Texas) said at Thursday's debate that "hell yes" he was going to seize AR-15s and AK-47s, the most popular rifles in America, from their owners if he became president. 
Sen. Kamala Harris (D., Calif.) got a fact wrong in her opening debate statement Thursday, proudly declaring that President Donald Trump was definitely watching their debate when he was actually giving a speech in Baltimore. 
Nine Democrats and a 78-year-old socialist will take the debate stage Thursday night in Houston. It doesn't matter which candidate you support, or if you're still undecided. You've made the worst possible choice. 