Senator John McCain is announcing today that he wants President Obama to issue a pardon for Jack Johnson, the "Galveston Giant" who ruled boxing's heavyweight division in the early 20th Century and was convicted of transporting a woman across state lines to get him some.Because McCain is all about the sex.No, actually, McCain says he thinks -- like a lot of people do -- that Johnson's arrest was racially motivated.The AP reports: "I've been a very big fight fan, I was a mediocre boxer myself," M