Prince Carl was once considered a candidate to the Norwegian crown during Norway's fight for independence from Sweden in 1905. To elect a prince from Sweden was considered to be a less radical way out of the union, and hence a more peaceful approach. However, King Oscar II of Sweden never approved on this, as he saw the whole "riot" as a betrayal against his rights as King of Norway. Hence Prince Carl never became King of Norway in 1905, instead a Danish prince was elected (Haakon VII) after some diplomatic turbulence. As history turned out however, Prince Carl's daughter, Princess Märtha, married Haakon VII's son, the later King Olav V. The present King Harald V of Norway is hence a grandchild of Prince Carl, Duke of Vänstergötland.
In 1904 Prince Carl was appointed a Knight of the Norwegian lion by King Oscar II.