President Donald Trump’s short-lived policy of separating families entering the country illegally worsened the U.S.’s already troubled efforts to protect unaccompanied migrant children from trafficking and abuse, a bipartisan Senate investigation found. “The Trump administration took steps that exacerbated” problems that emerged during Barack Obama’s administration, the Senate’s Permanent Subcommittee on Investigations said in a report released Wednesday that examines the government’s treatment of what it calls unaccompanied alien children. The Senate panel will hold a hearing on Thursday to grill officials from the Department of Health and Human Services, Customs and Border Protection, Immigration and Customs Enforcement and the Justice Department, on the flaws in the program to care for migrant children and how the family separation policy made matters worse. “The problems that exist today began during the previous administration and have continued under this one,” said Ohio Republican Rob Portman, the subcommittee’s chairman.