His campaign is offering volunteers all-expenses-paid trips to join his bus tour.
Warren is hoping to knock off her old rival, Scott Brown, whom she unseated in 2012.
Cruz said Republicans will not only control the Senate next year but also the White House in 2017.
Independent Greg Orman is still competitive despite facing a barrage of outside attacks.
“I’m so glad I can early vote,” Obama said.
National Republicans are spending money on more promising opportunities elsewhere.
Michelle Obama heads where her husband can't — Iowa, Colorado and Minnesota.
The S.C. Republican decried gay marriage as "a pestilence that has descended on our society."
Sen. Mary Landrieu and Rep. Bill Cassidy are likely to face a runoff election in December.
The DCCC raised $7 million online last month and has netted $163.2 million this cycle.