Former President Donald Trump and President Joe Biden have secured enough delegates to win their respective presidential nominations.USA TODAY Washington Bureau Chief Susan Page breaks down new polling data ahead of a Trump-Biden rematch.The U.S. sends more aid to Ukraine.The Uvalde police chief resigns.USA TODAY Investigative Reporter Kenny Jacoby looks at how an NCAA rule gives athletes a pass on sex crimes committed as minors.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.