U.S. immigration officials are seeking public comment on a proposal to collect social media handles from individuals applying for benefits such as green cards or citizenship. The proposal has raised concerns from immigration and free speech advocates, as it expands social media surveillance to individuals already vetted and legally in the U.S. The Department of Homeland Security is asking for feedback on the plan, which aims to comply with President Trump's executive order on national security. The proposal would require individuals to share their social media handles when applying for immigration benefits, and the public has until May 5 to provide feedback.