This week on "The West Block," host Mercedes Stephenson speaks with Public Safety Minister Marco Mendicino, who says Canada plans to ban 'high-risk vendors' in other sensitive industries in the wake of barring Huawei from the nation's 5G infrastructure. Then, Stephenson speaks with former Wildrose Party leader Danielle Smith about her goal to lead Alberta's United Conservative Party following Premier Jason Kenney's shocking resignation. Plus, the racially motivated mass shooting at a Buffalo, N.Y., supermarket thrust a white supremacist conspiracy theory into the spotlight. Stephenson is joined by extremism research Amarnath Amarasingam on what needs to be done to address white supremacy.