WASHINGTON — Republican Rep. Tom Kean Jr. of New Jersey, who has not voted in the House since March 5 , will miss another week of work in Washington as the House returns Tuesday, his office told NBC News. Kean’s office has said his two-month absence is related to a “personal health matter” but has not elaborated. The congressman has missed 68 votes in the House, including on legislation to end the record 75-day shutdown of the Department of Homeland Security . Kean, 57, is also running for re-