"I am making a collection of the things my opponents have found me to be and, when this election is over, I am going to open a museum and put them on display"

Lyndon B. Johnson is stating that he is monitoring all the negative criticisms and allegations made against him by his political opponents during the election. He means to utilize these as artifacts in a museum display screen after the election is over. His statement may suggest his self-confidence in winning the election, or it might be a sarcastic response to the attacks against him.