Montreal mourns victims of the deadly attack as investigators reveal new details and police warn about copycat threats; A Canadian-led study is challenging traditional breast cancer care, finding some patients may benefit from less intensive treatment; U.S. Ambassador Pete Hoekstra discussed Canadians returning to the U.S. and weighed in on relations between Ottawa and Washington.

CTV National News for Wednesday, July 1, 2026: U.S. rejects CUSMA renewal, triggering an annual review process
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CTV National News for Tuesday, June 30, 2026: Millions of Canadians under extreme heat warnings
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CTV National News for Monday, June 29, 2026: Six people presumed dead after charter boat sinks near Vancouver
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