Marco Rubio presidential campaign, 2016 declared he was running for president approximately three weeks after this fellow republican who has served  as the junior United States Senator from Texas since what year
Ted Cruz Rafael Edward Cruz ( ; born December 22, 1970) is an American politician and attorney who has served as the junior United States Senator from Texas since 2013. He was a candidate for the Republican nomination for President of the United States in the 2016 election.
Bob Graham presidential campaign, 2004 The 2004 presidential campaign of Bob Graham, senior United States Senator from Florida, began on February 27, 2003 when he filed papers to form an exploratory committee, after delaying his intent to announce on February 3rd due to having heart surgery on January 31. On May 6th, he formerly announced his entering into the race for President of the United States in the 2004 election on the Democratic ticket.