But conservative groups are rallying to Mack's defense, hoping to keep alive hopes of picking up Nelson's seat. American Crossroads has pledged to spend $6 million on the race, while a pro-Mack super PAC recently received a $1 million donation from casino mogul Sheldon Adelson. Paul Ryan's presence on the presidential ticket will play a particularly large role in this race, given Florida's senior-heavy population. Mack has tried to keep his distance from Ryan's budget plan in the past, but Nelson and his allies will take every opportunity possible to tie Mack to Ryan's controversial Medicare proposals.
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