Marilyn Gladu, a four-term Conservative MP who once sought leadership of that party, decamped Wednesday for the Liberal government, saying she could achieve more on that side of the aisle. “We need a global leader with a plan to make a more resilient Canada, a stronger Canada, a more self-reliant Canada for this critical moment,” she said as she stood next to Prime Minister Mark Carney. Mr. Carney said Ms. Gladu had distinguished herself as a collaborative MP willing to work across party lines. He also noted her past experience as an engineer. “We couldn’t be happier to have this expertise, experience and energy coming to our team,” he said. Ms. Gladu was first elected as the MP for Sarnia–Lambton–Bkejwanong in 2015. In last year’s election, she won just over 53 per cent of the vote. Ms. Gladu’s decision to leave for the Liberals stunned fellow Conservatives; as recently as late March, Ms. Gladu had accused the Liberals of not caring about Canadians’ Charter rights. Earlier this year, Ms. Gladu had told a media outlet in her riding that she believed people who cross the floor should run in by-elections #CdnPoli #Canada