Which factor deserves greatest weight when evaluating main variables affecting voting — voting behaviour and the main variables affecting voting in the USA? Use the relevant political concepts and evidence from The electoral process and direct democracy.

a named election, electoral rule, finance rule, primary contest or third-party result linked to the comparison and its consequence for electoral systems and party competition. This is correct because political evidence must connect a named election, electoral rule, finance rule, primary contest or third-party result to the stated UK-US claim.

Apply constituencies, plurality voting, primaries, the Electoral College, congressional elections, campaign finance and party coalitions precisely. UK elections combine parliamentary competition and varied electoral systems, whereas US elections use presidential, congressional and primary contests within a federal system.

A structural viewpoint emphasises formal rules; however, a rational or cultural viewpoint may explain how actors use those rules. Overall, judge the evidence from a named election, electoral rule, finance rule, primary contest or third-party result and explain whether electoral rules and campaign structures affect party unity, finance and opportunities for smaller parties for "Analyse and evaluate voting behaviour and the main variables affecting voting in the USA.".