No Kings protests across the US rally against Donald Trump

Large protests against the Trump administration are taking place in cities across the US, marking the third iteration of No Kings rallies that have previously drawn crowds into the millions.

Organisers say they are protesting against policies imposed by US President Donald Trump, including the war in Iran, federal immigration enforcement and the rising cost of living.

"Trump wants to rule over us as a tyrant. But this is America, and power belongs to the people - not to wannabe kings or their billionaire cronies," organisers said.

A White House spokesperson called the protests "Trump Derangement Therapy Sessions" and said the only people who care "are the reporters who are paid to cover them".

Throughout the day on Saturday, demonstrations are set to take place in nearly every major US city, including New York, Washington DC, and Los Angeles.

Rallies took over the streets of downtown Washington DC throughout the afternoon, with throngs of people marching through the nation's capital. Protesters lined the steps of the the Lincoln Memorial and packed the National Mall.

Like in previous iterations of No Kings, protestors held up effigies of Trump, Vice President JD Vance and other officials in the administration, calling for their ousting and arrest.

Thousands also crowded New York City's Times Square, marching through Manhattan's Midtown neighbourhood. Police had to shut down the normally busy streets to make way for crowds. In October, the New York Police Department said more than 100,000 people had gathered across all five of the city's boroughs.

The last No Kings rally in October drew crowds of nearly seven million people nationally.

Several US states mobilised the National Guard, but organisers have maintained that the events are peaceful.

Since returning to the White House in January, Trump has expanded the scope of presidential power, using executive orders to dismantle parts of the federal government and deploying National Guard troops to US cities despite objections by state governors.

Earlier this year, federal immigration agents in Minneapolis shot and killed two US citizens, Alex Pretti and Renee Good, sparking outrage and nationwide protests.

The president has also called on the administration's top law enforcement officials to prosecute his perceived political enemies.

The president says his actions are necessary to rebuild a country in crisis and has dismissed accusations that he is a behaving like a dictator as hysterical. "They're referring to me as a king. I'm not a king," he said in an interview with Fox News in October.

But critics warn some of the moves by his administration are unconstitutional and a threat to American democracy.

Crowds have gathered both in big cities and small towns. No Kings rallies are kicking off in Boston, Massachusetts, Nashville, Tennessee, and Houston, Texas. More big city protests are expected to kick off throughout the day.

The streets are also lined with people in cities like Shelbyville, Kentucky and Howell, Michigan, which has a population of just about 10,000.

People are holding signs protesting against the war in Iran and Immigration and Customs Enforcement (ICE) in neighbourhoods.

American expats abroad are also gathering to protest. Crowds have formed in Paris, London and Lisbon, where many hold signs calling the president a "fascist" and a "war criminal", as well as calling for his impeachment and removal from office.