SIOUX CITY, Iowa — A former Presidential candidate and his twin brother made a stop in Sioux City today to back a different 2020 Democrat.

Former Housing and Urban Development Secretary Julian Castro and Congressman Joaquin Castro stopped by Elizabeth Warren's campaign office in Sioux City Thursday morning to rally support for the Massachusetts Senator while she's serving on the impeachment jury.

"This is the third city that I have been in over the past couple of days and we are going to a few more cities, like Orange City and others. We are here in Sioux City because Sioux City is important to the turnout on caucus night. She is not taking any single community or vote for granted," said Julian Castro.

The Castros are among the numerous surrogates campaigning for Warren, Amy Klobuchar, Bernie Sanders and Michael Bennet.