Sen. Josh Hawley (R., Mo.) on Wednesday slammed Supreme Court nominee Judge Ketanji Brown Jackson’s lenient treatment of sex offenders.

Hawley, who sits on the Senate Judiciary Committee, argued in a lengthy thread that Jackson’s record as a policymaker and a judge shows an “alarming pattern” of letting sex criminals off the hook. That includes reducing sentences for child pornography offenders and questioning whether sex offenders should be forced to enroll in publicly accessible registries.

“Judge Jackson has a pattern of letting child porn offenders off the hook for their appalling crimes, both as a judge and as a policymaker,” Hawley tweeted Wednesday. “She’s been advocating for it since law school. This goes beyond ‘soft on crime.’ I’m concerned that this [is] a record that endangers our children.”