The US Department of Homeland Security is at risk of a shutdown due to a failed funding bill. Senate Democrats voted against the bill, which would have funded the agency through September, citing insufficient progress in negotiations with Republicans on immigration enforcement restrictions. Despite having 53 seats, Republicans need bipartisan support to pass most bills, as they are bound by a longstanding rule that allows Democrats to delay or block legislation through filibusters.
Source: https://www.wsj.com/politics/policy/dhs-funding-bill-blocked-ea224391