By both being the founding fathers and by both having something to do with the declaration of Independence
Perhaps the most momentous decision the Founding Fathers made at the beginning of the Philadelphia convention was to create two separate houses in the legislature--the Senate and the House--in order to give each state fair representation.
The main reason why policymakers in the Johnson administration wanted to continue U.S. involvement in Vietnam is because they wanted to justify the commitment of the US to the conflict--a commitment that had cost thousands of lives in an effort to contain communism.