With early voting under way this week in some Georgia counties, both sides in the Peach State’s marquee Senate runoff continue to roll out high-profile party leaders who will headline rallies and fundraising events ahead of the Dec. 2 election. The campaign of Democrat Jim Martin, which is already preparing to host former President Bill Clinton on Wednesday, will also welcome former Vice President Al Gore on Sunday at a rally in Atlanta, according to news reports on Tuesday. Speculation abounds in Georgia and Washington, D.C., about whether the Democratic Party’s biggest star, President-elect Barack Obama, will make an appearance for Martin in the next two weeks. On the Republican side, Sen. Saxby Chambliss came out of the gate last week with two high-profile events that featured Sen. John McCain (Ariz.) and former Arkansas Gov. Mike Huckabee. This Friday, the embattled Senator is scheduled to host former Massachusetts Gov. Mitt Romney at an Atlanta campaign event, and invitations have also gone out to other party celebrities to appear, including Alaska Gov. Sarah Palin and former New York Mayor Rudy Giuliani.