Updated on: May 7, 2026 / 12:26 PM EDT / CBS News Add CBS News on Google Senate and House Democrats have launched an investigation into whether pardons and commutations issued by President Trump were driven by "pay-to-play dynamics," according to letters obtained by CBS News.  Among the pardons being probed by lawmakers are those granted to cryptocurrency billionaire Changpeng Zhao, who pleaded guilty to money laundering; nursing home operator Joseph Schwartz, who was convicted of tax crimes; and entrepreneur Trevor Milton, sentenced to four years in prison in 2023 after being convicted of lying to investors. On Thursday, California congressmen Dave Min and Raul Ruiz, as well as Vermont senator Peter Welch sent letters to more than a dozen recipients of executive clemency — seeking to unearth how they may have received favorable treatment from Mr.…