Sen. Al FrankenAlan (Al) Stuart FrankenGOP Senate candidate says Trump, Republicans will surprise in Minnesota Peterson faces fight of his career in deep-red Minnesota district Getting tight — the psychology of cancel culture MORE (D-Minn.) said Sunday that he has "nothing against" a travel ban from West African countries affected by Ebola, but it would not solve the problem. 

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Franken, speaking during a debate with GOP challenger Mike McFadden, also said a ban would be "insufficient" because most flights do not come directly from West Africa to the United States. 

McFadden supports a travel ban, as do Republican Senate candidates around the country, in what has become a major issue in campaigns. 

Democrats in close races, such as Sens. Mark UdallMark Emery UdallThe 10 Senate seats most likely to flip Democratic presidential race comes into sharp focus Democrats will win back the Senate majority in 2020, all thanks to President Trump MORE (Colo.) and Kay HaganKay Ruthven HaganThe Hill's Campaign Report: Democratic Unity Taskforce unveils party platform recommendations Democrats awash with cash in battle for Senate The Hill's Campaign Report: Trump's job approval erodes among groups that powered his 2016 victory MORE (N.C.) have come out in support of a travel ban.

Franken is not as vulnerable as those senators — he is up by double digits in the polls — but he is still not opposing a ban. 

Franken also said he was disappointed in President Obama. "I had high hopes when he came in," he said. "I've been disappointed. I've been disappointed in his inability to deal with this gridlock. But I've also been disappointed in the gridlock that's been created, especially by the Tea Party."

There were attacks by Franken, too, as he hit McFadden, a former executive at the investment firm Lazard Middle Market, for layoffs during a restructuring of a company. Lazard took a reference to the restructuring off its website, after Franken starting running attack ads on it.

"If you're a CEO and you don't take responsibility for what your company does, what are you going to do as a senator?" Franken asked.