Rochelle Feinstein’s “Fredonia!” features new and recent works that capture themes of turmoil, anxiety, and dark humor that are so relevant to the current state of the world. The exhibition title comes from the failed country in the 1933 Marx Brothers film Duck Soup, which referred to a fictional utopia named for the U.S. On view are selections like artist’s red-and-blue “Plein Air” series (hello, Electoral College) and “Happiness” paintings, as well as works with a recurring rainbow motif—which Feinstein depicts in varying forms.