Michael Bennet of Colorado has become the 7th Senator to join the 2020 presidential race. He made the announcement Thursday during an appearance on CBS "This Morning". 

His campaign put out a video called "7,591 words". This is the number of words in the U.S. Constitution, including the 27 amendments:

Bennet has long been expected to jump in the race. However, his timetable was changed after a diagnosis of prostate cancer earlier this year. Following surgery, he has received a clean bill of health.

In a field of over 20 candidates, Bennet joins his Senate colleagues Cory Booker (NJ), Kirsten Gillibrand (NY), Kamala Harris (CA), Amy Klobuchar (MN), Bernie Sanders (VT) and Elizabeth Warren (MA).  His fellow Coloradan, former Gov. John Hickenlooper is also in the running for the Democratic nomination.