Who was Rebecca in relation to President Calvin Coolidge?

President Coolidge's favorite pet was a raccoon named Rebecca; he built a special house for her, visited her every day, and walked her around the White House on a leash. When the White House was being repaired and President Coolidge and his family moved temporarily, the President worried that Rebecca might get lonely, so he sent a limousine to bring her from the White House to stay with them.