Crossroads isn't the first group to run ads in Nebraska. The state Democratic Party, funded by the Democratic Senatorial Campaign Committee, has already aired $1.25 million in pro-Nelson advertising, and last week the Democratic Senate Majority PAC spent another $100,000 on their own ads.
Nelson has yet to commit to running for another term; instead, he's said he'll consult with his family over the holidays. National Democrats are publicly optimistic after polling conducted for Nelson's campaign showed Nelson leading all three likely Republican candidates vying for the right to face him.
Democrats privately concede that their bench in Nebraska is painfully weak. If Nelson doesn't run, the party is likely to write off the seat as lost to Republican hands. But the leading GOP candidates aren't lighting fires under anyone yet; national Republicans recently called Gov. Dave Heineman to encourage him to run, though Heineman declined.