United States Senator and Republican presidential presumptive nominee John McCain (Republican-Arizona) kisses Trig, son of his running mate Alaska Governor Sarah Palin, held by Palin's daughter Willow as her other daughters Piper, (L) Bristol (R) and Bristol's boyfriend, Levi Johnston (second from right) look on as he arrived at the Minneapolis St Paul International Airport in Bloominton Minnesota to attend the the Republican National Convention in St Paul, Minnesota, 3 September, 2008.