The Liberals only need to win one of Monday's three federal byelections to clinch a majority in the House of Commons, but Prime Minister Mark Carney welcomed one NDP and four Conservative floor-crossers to get here. Laura D'Angelo, Zain Velji and Michael Solberg debate whether managing a slim majority and a patchwork caucus could become Carney's nightmare.

Globe and Mail Ottawa bureau chief Robert Fife, The Canadian Press deputy parliamentary bureau chief Mia Rabson and La Presse parliamentary bureau chief Joël-Denis Bellavance debate whether the crossing of a deeper-blue Conservative to the Liberals could be a headache for both parties, with Fife saying MP Marilyn Gladu is plainly going against what she previously said she believes in.

Prime Minister Mark Carney defends accepting former Conservative MP Marilyn Gladu into his caucus despite her past opposition to a host of Liberal policies and positions, saying crossers bring 'a series of perspectives and expertise that is aiding the country.' Liberal House leader Steven MacKinnon tells Power & Politics that the party has values that Gladu 'has to adhere to.' Plus, Sarnia Mayor Mike Bradley says he wants Carney to call a byelection in Gladu's riding so voters can confirm they really want a Liberal MP.