US President Donald Trump has threatened to deploy troops to Baltimore, escalating a clash with Maryland Governor Wes Moore after the Democrat invited him to join a safety walk in the city.

If Wes Moore needs help, like Gavin Newscum did in L.A., I will send in the 'troops,' which is being done in nearby DC, and quickly clean up the Crime, Trump wrote on social media.

The comments mark the latest flashpoint in the president's efforts to deploy National Guard troops to Democratic-led cities as part of what he calls a crackdown on crime.

The use of military personnel for domestic law enforcement has drawn fierce backlash from Democrats. One governor described it as an abuse of power.

Trump has already deployed around 2,000 troops to Washington DC, a Democratic stronghold. The National Guard recently started to carry weapons in DC as part of its operations.

Governor Moore, a frequent critic of Trump's strategy, remarked that Trump's comments are tone-deaf and reflect a lack of understanding of the community's realities.

A poll released earlier indicated that nearly 80% of Baltimore residents oppose the deployment of federal officers and the National Guard, reflecting widespread concern over such military strategies in urban areas.