US president has faced backlash from judges and governors for deploying troops amid escalating campaign in Portland

A federal judge on Monday declined to immediately block the Trump administration from deploying national guard troops to Chicago, Illinois, after the state became the latest to try to use the courts to stop Donald Trump from sending in the military.

The decision was the most recent turn in a three-day whirlwind of legal developments over Trump’s efforts to send federal troops to Democratic-led cities.

Here’s what to know about the fight over Trump’s deployment of the national guard.

The first major ruling came on Saturday, when US district judge Karin Immergut, in a case brought by the state of Oregon, blocked the Trump administration from mobilizing 200 Oregon national guard troops to Portland, where protesters have gathered in the block surrounding a US Immigration and Customs Enforcement building (Ice) in recent weeks.