PHILADELPHIA (AP) — Cities large and small were preparing for major demonstrations Saturday across the U.S. against President Donald Trump, as officials urge calm, National Guard troops mobilize and Trump attends a military parade in Washington to mark the Army’s 250th anniversary.

As a military parade rolls through Washington, DC, on Saturday – President Donald Trump’s birthday – millions of Americans are expected to protest in what organizers predict will be the strongest display of opposition to Trump’s administration since he took office in January.

Police in Sonoma and Napa counties are preparing as North Bay protesters join a nationwide wave of No Kings Day rallies.

Organizers are calling for Americans to attend demonstrations across the country to protest President Trump on his 79th birthday.

Rachel Maddow reports on the planning of a massive protest event called "No Kings" scheduled for Saturday, June 14th, overshadowing Donald Trump's theatrical military parade, and marking a new peak in anti-Trump activism.

"No Kings" protests against the Trump administration are set to take place today in and around New York City as part of nationwide demonstrations. The protests coincide with Saturday's military parade in Washington,

CNN spoke to several protesters among the millions of Americans who are expected to attend “No Kings” protests across the country on Saturday to denounce what organizers describe as President Donald Trump’s authoritarian policies and “militarization of our democracy.