OTTERTAIL, Minn. — U.S. Sen. Kevin Cramer says Minnesota has emerged as an important opportunity for Republicans as the party fights to maintain control of the U.S. Senate in a challenging midterm environment. Appearing Friday on What’s On Your Mind, Cramer pointed to Republican U.S. Senate candidate Michele Tafoya’s close race against Democrat Peggy Flanagan as one of the brighter spots on this year’s Senate map. Cramer said a Republican victor…