More than 250 Republican donors and self-described gun rights supporters penned an open letter this weekend calling for Congress to move on limited gun reform after an elementary school shooting in Uvalde left 19 children and two teachers dead. “Most law enforcement experts believe these measures would make a difference,” said the letter, according to The Texas Tribune. “And recent polls of fellow conservatives suggest that there is strong support for such gun-safety measures.” The letter, which ran as a full-page advertisement in The Dallas Morning News on Sunday, also expressed support for the work of Sen. John Cornyn (R-Texas),...