Former CNN political analyst Chris Cillizza said Wednesday that President Joe Biden’s comment about having to “lock [former President Donald Trump] up” is damaging to Vice President Kamala Harris’ campaign.

Biden made the “lock him up” remark Tuesday at New Hampshire’s Democratic National Committee office, referencing the tight race between Trump and Harris and claiming the former president believes he is immune from “physically eliminating” threats. Cillizza, on his YouTube channel, said while he does not believe Biden is deliberately undermining Harris, his comment will likely give Trump a boost in his efforts to defeat her.