Former Governor Romney and Senator Thune speak:
Mitt Romney said Wednesday that he asked his political advisers a year ago whom they thought could be his toughest opponent in gaining the Republican nomination for president.
?The number one answer was about some senator from South Dakota that I?d never met ? and he?s here with me today,? Romney said, looking over at Sen. John Thune. ?I?m so lucky he didn?t run, and I?m so glad he?s willing to be with me today.?
Discussion of endorsement: