In Baltimore, Trump said that if he is president, the National Guard "will always have a direct line to the Oval Office".
At a weekend fundraiser in New York, Clinton said: "You know, to just be grossly generalistic, you could put half of Trump's supporters into what I call the 'basket of deplorables.' Right? The racist, sexist, homophobic, xenophobic, Islamophobic - you name it."
She said in a statement the next day that she regretted using the word "half" to describe the Trump supporters. She added: "Let's be clear, what's really 'deplorable' is that Donald Trump hired a major advocate for the so-called 'alt-right' movement to run his campaign and that David Duke and other white supremacists see him as a champion of their values."
Trump is embarking on a busy campaign schedule this week. He will hold a rally in Asheville, North Carolina, today, marking his second stop in the key battleground state in two weeks.
While Trump has in the past questioned Clinton's "strength" and "stamina" to be president, he did not comment on the news about Clinton's health.
Clinton fell ill during a 9/11 memorial service on Monday. A statement from her doctor said she was recently diagnosed with pneumonia.