The National Guard has at times detained protesters in its deployment to Los Angeles, an official said Wednesday, as demonstrations against Immigration and Customs enforcement raids spread to other major cities.

Marines have moved into Los Angeles to guard a federal building after a week of protests against immigration raids, while communities across the country are preparing for demonstrations against President Donald Trump’s polices this weekend.

Nationwide protests against President Trump’s crackdown on immigration are putting Democrats in tricky political territory ahead of the high-stakes midterms. After demonstrations against Immigration and Customs Enforcement (ICE) raids roiled Los Angeles and prompted Trump to call in the National Guard despite California’s objections,

Marcos Leao, a former Army combat engineer, was detained by Marines as he was rushing to get to a Veterans Affairs appointment.