US President Donald Trump rounded on House Speaker Nancy Pelosi Wednesday after she was caught on camera visiting a San Francisco hair salon in breach of coronavirus lockdown rules – and with her face mask removed.The Democrat, a bête noire for Trump and his supporters, regularly hounds the billionaire Republican for his handling of the pandemic, which has killed more than 185,000 people in the United States.In June she targeted his procrastination over endorsing the use of face masks, widely…