Government lawyers argued Tuesday that the New Jersey Supreme Court should reject a request to move a special U.S. Senate election that Gov. Chris Christie scheduled three weeks before the state’s regular Nov. 5 election. Christie and all 120 legislative seats are up for election in November. However, the governor set the special election for Oct. 16 — the first legally allowable date — to fill the remaining year of a Senate seat left vacant by the death of Sen. Frank Lautenberg. Democrats sued, and an appeals court quickly and unanimously sided with Christie, ruling the governor within his authority to set the special election schedule. The Supreme Court received briefs this week from challengers seeking emergency consideration to invalidate the dates. They say it’s unnecessary to hold a special election so close to regularly scheduled balloting, which will cost taxpayers an extra $12 million. There is no word on when the court might rule. Party primaries are scheduled for Aug. 13. Four Democrats and two Republicans have qualified.