Republican political strategist Karl Rove says President Barack Obama and fellow Democrats have gone "beyond the pale" for suggesting that the U.S. Chamber of Commerce may be using foreign contributions to finance advertising against Democratic congressional candidates.

In a speech last week, Obama said groups receiving foreign funds are spending money to influence American elections.

Rove says Democrats have no evidence that the chamber is violating the law by using foreign funds to pay for its campaign activities. The chamber doesn't disclose its donors, and Rove said the chamber doesn't use foreign funds for U.S. politics.

Rove said on "Fox News Sunday" that the charges are baseless and added, "How dare the president do this."