(FOXNEWS) — Funnyman-turned-senator Al Franken is running a dead serious campaign for re-election, as some observers see him potentially vulnerable due to President Obama's low approval ratings in Minnesota and a vigorous GOP opponent with eyes on a sleeper upset.
Just how vulnerable is up for debate, and the race nevertheless is seen as favoring the Democrats.
But both sides now acknowledge that, with less than two months to go until Election Day, Minnesota's Senate contest between Franken and Mike McFadden, a longtime Minnesota businessman, is shaping up as a battle.
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"We've always known this was going to be a tough race and it's clear we've got one," Franken spokesman Ryan Furlong told FoxNews.com, adding that the campaign is building "a strong and aggressive grassroots organization across the state."