The US House of Representatives has rejected a compromise to end a six-week partial government shutdown, raising concerns about long security lines at U.S. airports. Instead, the House will vote on a temporary measure extending funding for the Department of Homeland Security at current levels for two months. The Senate passed the bill, which does not address the underlying issue of immigration enforcement. The House will instead vote on extending funding, which is likely to prolong the impasse. The shutdown has led to long lines at airports and many of the 50,000 security officers who have gone without pay have called in sick or resigned. Democrats, the minority party in both houses of Congress, used their limited power to block DHS funding after federal agents shot and killed two US. citizens.