The "shoestring tie" worn by Senator George Norris serves as a potent symbol in Profiles in Courage. Although the item only appears in Senator Norris's section of Part 4, it serves to symbolize a wider thematic concern throughout the book: that of authenticity. In his description of Norris, Kennedy uses the tie to solidify a connection between Norris's character and his policy, one which offers integrity and authenticity to his positions. Norris's continued wearing of his black shoestring tie symbolizes the value of authenticity from consistency, echoing the consistency with which he maintains his positions and principles, despite the incredible criticism and abuse he faces.

The shoestring tie presents an image of resistance against the corruption and materialism with which politics and politicians are viewed. While the tie itself is a superficial choice, and only a statement by interpretation, it illustrates Norris's indifference to the privilege and elitism presented by the Senate. Norris's indifference has special significance, given Kennedy's own understanding of the Senate and its origins as a political and social body. In Part 1, Kennedy describes the Senate as implicitly designed as a more elitist chamber, particularly in comparison with the House of Representatives. This elitism, Kennedy explains, is meant to insulate senators from public opinion and dampen partisanship by encouraging its members to be collegial.