MINNEAPOLIS — Minnesota Sen. Al Franken said he opposes President Barack Obama’s nominee for U.S. ambassador to Norway.

Franken said he agrees with the Norwegian-American community’s doubts over whether George Tsunis would be an effective ambassador.

Franken made his comments in a letter Monday to Secretary of State John Kerry. The Minnesota Democrat, who is running for re-election, said he will vote against confirming Tsunis if it comes up for a vote in the Senate.

Tsunis is a top Democratic political fundraiser. Concerns were raised about his nomination after a poor performance in his confirmation hearing before the Senate Foreign Relations Committee earlier this year.

Minnesota’s other senator, Democrat Amy Klobuchar, earlier told the White House she also opposes Tsunis’ nomination.

Messages left for Tsunis were not immediately returned Tuesday.