<p>Three federal byelections could mark an important milestone for the Carney Liberals. One win would mean the Liberals would have a majority government. </p><p>We look at what’s at stake in today’s vote.</p><p><br></p><p><br></p><p>And: The U.S. has imposed a naval blockade on Iran. It went into effect today, after this weekend's talks between the United States and Iran collapsed. The shaky ceasefire is still in effect for another week. </p><p><br></p><p>Also: Cancer is still the leading cause of death in Canada. Despite more screening and prevention tools, numerous types of cancer are increasing, according to a new study.</p><p><br></p><p>Plus: Drug crisis in British Columbia, Trump vs. the Pope, Ontario restructures school boards, and more.</p>
