Lawmakers face a Jan. 15 deadline to agree on a spending bill to keep the government running and avoid a partial shutdown that roiled Congress last fall. Passage of legislation in December scaling back the automatic, across-the-board cuts gave the House and Senate Appropriations Committees time to draft a massive, trillion-dollar-plus measure to run the government through September.A short-term measure is likely this month just to let the government continue operating. The GOP-controlled House and Democratic-led Senate spent a chunk of last year wrangling over renewing the nation's farm bill after passing competing versions of the five-year, roughly $500 billion measure. In dispute are crop subsidies and how deeply to cut the $80 billion-a-year food stamp program, with the House slashing $4 billion and the Senate $400 million annually. Several contentious issues loom in the near term. Twenty-six senators have signed on to a new Iran sanctions bill that Obama opposes while his administration negotiates with the Iranian government over its nuclear program. Proponents of the legislation are seeking to gain the support of further senators when Congress reconvenes, with the hope of a full Senate vote this month. Although the issue may not be an immediate legislative priority for returning lawmakers, it could become a major point of discussion as advocates and opponents of fresh penalties make their cases. Reid spared the administration a vote in December, but this month he may not be able to hold off proponents of tough sanctions. The majority leader did promise Sen. Kirsten Gillibrand, D-N.Y., a vote on her legislation to give victims of rape and sexual assault in the military an independent route outside the chain of command for prosecuting attackers. Her solution would take the decision from commanders and give it to seasoned military lawyers. The top echelon of the military, the Democratic chairman of the Senate Armed Services Committee and other Senate Democrats and Republicans oppose her plan. Reid backs it, as do several top Senate conservatives such as Ted Cruz, R-Texas, and Paul, but Gillibrand is still short of the 60-vote, filibuster-proof threshold.