Bush's three main opponents in the
1988 Republican Party presidential primaries were Senator
Bob Dole (R-KS);
Pat Robertson, an evangelist; and Representative
Jack Kemp (R-NY). Bush was long held back by the widespread perception of him as a "wimp" who had only ever done the bidding of others. His efforts to fight this perception included recruiting
Roger Ailes to emphasize Bush's status as a
World War II veteran, which Ailes did by producing a biographical ad. In that year's Iowa caucus, held on February 8, 1988, Bush finished in third, behind winner Dole and runner-up Robertson. Bush's support then began to deteriorate, partly because former
Secretary of State Alexander M. Haig Jr. had recently endorsed Dole. The Bush campaign then decided to produce an
attack ad against Dole. Ailes got the idea to make an ad portraying Dole as a "straddler" on the issue of raising taxes, based on one of Dole's own ads describing Bush with the same word. Bush's campaign focused on building a "Firewall" in the
Southern United States, a strategy that proved successful after he won multiple primaries there on March 8. Bush was also successful in winning the
New Hampshire primary against Dole on February 16, partly with help from the state's then-governor
John H. Sununu, who successfully convinced many political figures in the state to support Bush by offering them low-digit license plates. Subsequently, Bush became the probable Republican nominee, completing a transformation of his status from loser to front-runner in 29 days. After it became clear that Bush would be the Republican nominee, President
Ronald Reagan endorsed him, saying in May 1988 that "I'm going to work as hard as I can to make Vice President George Bush the next president of the United States". Reagan did not campaign strongly for Bush during the rest of the election, however. ==Convention==