How Will the Election of Obama Affect Roe vs. Wade?

The biggest factor in the abortion battle is the prospect of Roe vs. Wade being overturned. And for that to happen, conservative justices would have to be appointed to the Supreme Court, and that will be determined by the president and the Senate. President Obama and the Democratic Senate will not appoint conservative judges. But if Obama becomes unpopular during his term, there could be a backlash against him, and that could bring conservatives into the senate in 2 years and 4 years and a conservative in the white house in 4 years. If that were to occur, such a conservative administration would be able to appoint justices that would overturn Roe vs. Wade.