Only weeks after the White House made headlines with a directive urging prosecutors to get tougher on corporate crime, the Obama administration has moved to protect a convicted financial firm from punishment. The bank, Credit Suisse, has donated hundreds of thousands of dollars to President Barack Obama’s political campaigns. It also employs the Podesta Group, a lobbying firm with family connections to the Obama administration and Hillary Clinton’s 2016 campaign. In 2014, Credit Suisse pleaded guilty to criminal charges for operating “an illegal cross-border banking business that knowingly and willfully aided and assisted thousands of U.S. clients in opening and...