She was responding to comments the US President made on Twitter telling the likes of Somalian-born Democrat Ilhan Omar, Alexandria Ocasio-Cortez, Ayanna Pressley and Rashida Tlaib to “go back” to their “broken and crime infested” countries.
Writing on Twitter, she said: “What truly makes our country great is its diversity.
“I’ve seen that beauty in so many ways over the years.
“Where we are born here or seek refuge here, there’s a place for us all.
“We must remember it’s not my America or your America.
“It’s our America.”
Now Mr Morgan has claimed the former First Lady and chat show host Oprah Winfrey could be the only two Democrats to unseat Mr Trump as US President.
The television personality, who was the only journalist to be granted an interview with Mr Trump during his state visit of the UK last month, has endorsed Mrs Obama and Mrs Winfrey as possible Presidential contenders.
Speaking on BBC’s political programme This Week, he said the Democrats will need star power to be successful in next year’s elections.
Mr Morgan said: “They are going to be in a position that party, when they will be desperate for someone who can actually beat Trump.
“If you ask me, the two names who can beat him. They would be Michelle Obama or Oprah Winfrey, if they could be persuaded. I’m totally serious.
“I think they have the star power, I think they have the television quality that you need to be a candidate these days, I think they have the universal appeal. They’ve got balls of steel.”
Earlier this year, Mrs Obama said she would not run for President because she was “not interested in politics” and no longer lived a normal life.
Oprah Winfrey’s partner Stedman Graham has poured cold water over speculation of her running in the presidential elections.
He told ITV’s Good Morning Britain, the show which Mr Morgan co-hosts: “She is not divided by parties, she has the ability to move in and out all different circles.
“It doesn’t make a lot of sense to run for presidency because she can do so much more.”