Watch: How Elizabeth Warren Became the Policy Engine of the Democratic Party

Number of Introduced Bills Passed by One Chamber

Warren has introduced 305 bills. 15 passed.
Booker has introduced 269 bills. 12 passed.
Harris has introduced 86 bills. 5 passed.
Sanders has introduced 909 bills. 8 passed.

Number of Introduced Bills that Became Law

Warren has introduced 305 bills. 0 became law. 
Booker has introduced 269 bills. 2 became law.
Harris has introduced 86 bills. 0 became law.
Sanders has introduced 909 bills. 3 became law.

Here are the statistics for the referenced politicians when you consider legislation that they have co-sponsored:

Number of Co-Sponsored Bills that Became Law as of March 2019

Warren has co-sponsored 1,766 bills. 45 became law.
Booker has co-sponsored 1,314 bills. 36 became law.
Harris has co-sponsored 575 bills. 13 became law.
Sanders has co-sponsored 5,979 bills. 217 became law.

Source

/r/politics Thread Parent Link - time.com