Factual error: The show depicts the vote ending in a 50-50 tie, and then shows VP Doyle casting a tie-breaking vote for Montez (which the show then erroneously treats as Montez being elected president - she would simply be the VP "acting as president" for as long as the House fails to resolve the stalemate). 67 senators have to cast votes for the meeting to count, and 51 votes are needed to be VP. A 50-50 tie in this case. The 12th amendment actually provides a procedural exception to the tie-breaking power, by stating that the majority of whole Senators, in this case, 51, are necessary for the selection of the VP. As the vice president is not a senator, his vote would not have an effect on reaching the necessary 51, and thus a 50-50 vote would simply trigger a new ballot, and the senate would continue to vote until someone is elected. In this regard, the show makes another mistake with an on-screen graphic identifying Doyle as a senator, and not the vice president, who while given the constitutional role of president of the senate is not actually a senator.
Factual error: Waterloo County Fair labeling shown at least twice. Waterloo is not a county. Black Hawk is the county and Waterloo is the city in Black Hawk County.