Liberal Leader Justin Trudeau hit the campaign trail Monday with a health-care announcement but was immediately put on the defensive over a tweet from his deputy prime minister that Twitter flagged as "manipulated media." A video in the tweet stitches together clips of Conservative Leader Erin O'Toole that the Liberals say illustrates his support for private health care. The other leaders call it misinformation, but Trudeau insists the entire video shows O'Toole supports for-profit, private health care.