Although sending uninvited troops into Baltimore’s crime fight would be uncharted territory, a National Guard presence in the city is not.

President Donald Trump continues to talk about deploying the National Guard to Democratic-led cities like Chicago and Baltimore, sparking opposition from local leaders.

Even after a federal court ruled his use of the National Guard in LA was illegal, the president has weighed sending troops to Chicago, Baltimore and New Orleans. Here's where things stand in those cities.