WASHINGTON — The Supreme Court will again wade into the fractious issue of abortion this week when it hears arguments over a medication used in the most common way to end a pregnancy, a case with profound implications for millions of women no matter where they live in America and, perhaps, for the race for the White House.Two years after the Supreme Court overturned Roe v. Wade and cleared the way for bans or severe restrictions on abortion in many Republican-led states, abortion opponents on Tuesday will ask the …