The new speaker of the Massachusetts House of Representatives is “disappointed.” Nearly the entire congressional delegation has “serious concerns.” And Boston city leaders are sounding the alarm on a slow, unequal start to vaccine distribution.

Governor Charlie Baker, long one of the country’s most popular executives, faces mounting criticism over what officials at every level of Massachusetts government call a flawed vaccine rollout. As national metrics have shown Massachusetts lagging, the second-term Republican is working to reverse early disappointments and maintain his reputation as an expert manager.