Ken Paxton, the Texas attorney general who was endorsed by President Trump, ousted Sen. John Cornyn in the Republican primary for Senate in Texas, a result likely to energize both MAGA loyalists and Democrats hoping to flip the seat. Read more: https://nyti.ms/4tYVEu8 Here are five things to know about Paxton: https://nyti.ms/4faH2nz Also, Rep. Christian Me…