The US Secret Service postponed a meeting on Monday where it was due to field questions from Congress about why agents failed to prevent a gunman from almost killing Donald Trump, as the agency increases protection for the former president. Secret Service Director Kimberly Cheatle had been due to brief the House Homeland Security Committee on Monday. President Joe Biden has ordered an independent review, and Republican lawmakers vowed swift investigations. Read our liveblog to see how all the day's events unfolded.
