Jacqueline Kennedy personally selected Shikler in 1970 to provide the posthumous character study of
John F. Kennedy,
Oil Portrait of John F. Kennedy, which serves as Kennedy's official White House portrait. He also painted the official White House portraits of First Ladies Jacqueline Kennedy and
Nancy Reagan, as well as portraits of the Kennedy children and is represented in numerous public collections such as The Brooklyn Museum of Art, The Metropolitan Museum of Art, the Hirshhorn Museum and Sculpture Garden, the New Britain Museum of American Art, and the National Academy of Design. Shikler painted the
official White House portraits of Nancy and Ronald Reagan in 1989. His portrait of Ronald Reagan was subsequently rejected as being an insufficient likeness and put into storage in 1991. A second portrait, painted by
Everett Raymond Kinstler in 1991, was deemed more successful and presently hangs in the White House. Shikler's portrait of Nancy Reagan depicted her in a red dress and is presently part of the White House collection. ==Awards and honors==