Elon Musk posted a cryptic message about the "No Kings" protests after activists took to the streets across the U.S. over the weekend.

On Saturday (January 14), mass protests against President Donald Trump took place across the US at the same time as a military parade in Washington D.C. for the Army’s 250th anniversary, which also fell on Trump's 79th birthday.

Between activism, election results and protest turnout, the prevailing political winds suggest the backlash to the president is real.

Democracy is “in real trouble,” Mark Ruffalo told MSNBC’s Antonio Hylton while attending the “No Kings” rally in New York City Saturday. His words were echoed by Ellen Pompeo, Kerry Washington, Jimmy Kimmel, and many more notable people and celebrities who spoke out in support of the nationwide protests.

Additional celebrities including Anna Kendrick, Gina Rodriguez-LoCicero and Tessa Thompson were out on Saturday to protest against the Trump administration.

Leading up to the military parade in Washington, D.C. Saturday, as many as 2,000 cities erupted in a coordinated, nationwide protest.

OneRepublic's Ryan Tedder said that the massive nationwide 'No Kings' protests on the 250th anniversary of the U.S. Army are a 'super bummer.'

Texas police say there are more than 10,000 people in attendance at the Capitol for Saturday's 'No Kings' protest. Follow for live updates.