‘Light on and a door open’ for all who support ‘immutable’ Liberal principles: MacKinnon CTV NewsLetters to the editor, April 12: ‘Why bother voting at all when MPs can simply change parties when convenient?’ The Globe and MailPlease Advise! Is Carney’s Big Tent Turning into a Circus? The TyeeÉric Blais: Marilyn Gladu’s floor-crossing reveals more about Pierre Poilievre than his podcast interviews Toronto StarLetters: With floor crossings, why do we even bother to vote? National Post