BUENOS AIRES – Argentine senators debated for hour after hour over legalizing abortion, wrangling into the early hours of Wednesday before a vote that could mark the culmination of a decades-long fight by women's groups in Pope Francis' homeland and have repercussions across a continent where the procedure is largely illegal.The bill, which would legalize elective abortion in the first 14 weeks of a pregnancy, was already approved by Argentina’s Chamber of Deputies and had the support of President Alberto Fernández, meaning the Senate vote would be its final hurdle.If the measure should pass, Argentina would be the largest Latin American country to legalize abortion and the vote was being closely watched.