Crowd estimates for the Women's March in Washington DC on Saturday topped one-million, while another 1.5 million were on the streets in Chicago, Boston, New York, Los Angeles, Philadelphia, and more than 600 other cities across America and the world.
But that did not stop the Donald from taking aim at all those people in a tweet on Sunday morning.
'Watched protests yesterday but was under the impression that we just had an election! Why didn't these people vote? Celebs hurt cause badly,' he wrote.
He then followed that up with a message about the number of people who watched his inauguration on TV, tweeting: 'Wow, television ratings just out: 31 million people watched the Inauguration, 11 million more than the very good ratings from 4 years ago!'
Nielsen ratings confirmed Trump's claims were correct, however his inauguration did not have 'the largest audience ever' - as his spokesman Sean Spicer told reporters as Saturday night.