"When you put out things that people can get behind, you also put out things that people can criticize," says Grant Reeher, professor of political science and director of the Campbell Public Affairs Institute, about Senator Warren's campaign strategy to release detailed policy positions early on in the primary cycle.

"The size of the court is not specified in the constitution and it's changed multiple times…in the first 100 years it was a regular occurrence for Congress to change the size of the Supreme Court," says Thomas Keck, professor of political science and Michael O. Sawyer Chair of Constitutional Law and Politics.