What does the fact that the major parties cooperate to discourage minor parties and yet complete vigorously against each other during elections tell you about party politics in the US?

The cooperation between major parties to undermine minor parties reflects a strategic understanding that a two-party system consolidates their power and control over the political landscape. This behavior indicates that while they may compete fiercely for votes, both parties recognize the threat that third-party candidates pose to their electoral success. Consequently, they often collaborate to create barriers for minor parties, ensuring that the political discourse remains dominated by their platforms. This dynamic illustrates the tension between competition and the preservation of the status quo in U.S. party politics.