Republican members of the U.S. House Intelligence Committee used most of their speaking time during recent impeachment hearings to run interference for President Donald Trump. They attacked the credibility of fact witnesses, pushed alternate narratives about foreign interference in U.S. politics, and tried to shift the focus to the whistleblower despite extensive corroborating evidence.

The Iowan who served on the House Judiciary Committee when Congress considered impeaching President Richard Nixon recalls GOP colleagues who were open to discovering and considering facts about the president’s possible high crimes and misdemeanors.

A must-read review of what recent history tells us about the impact of presidential debates. You can find Dan Guild’s past writing for this site here and here. -promoted by desmoinesdem

Debates have arguably remade the race for the Presidency in 1976, 1980, 2000, 2004 and 2012. Even in races where arguably they are less important, they still are significant events. Having said all of this there are patterns that repeat themselves. Guideposts that can help evaluate how they will affect this race. Here they are:

1. Typically debates consolidate support within their Party for each candidate. Where this is unequal, the candidate who is behind tends to benefit.

2. In races where there is significant discontent, debates often help the candidate of the party that is on the outside.

3. Third Parties frequently decline afterwards