The Democratic presidential field is expected to be extremely large for the coming national election. Beside Mr. Castro, US Rep. John Delaney (D-MD) has also announced his intention to run. Others expressing interest include former Vice President and US Senator Joe Biden, Los Angeles Mayor Eric Garcetti, outgoing Colorado Gov. John Hickenlooper, former Virginia Gov. Terry McAuliffe, retiring Rep. Luis Gutierrez (D-IL), and billionaire Tom Steyer, among others. Once their re-election campaigns to the Senate are successfully completed in 2018, both Elizabeth Warren and Bernie Sanders are also expected to become major presidential players, as well.