Julián Castro
The former vice president, 76, dismissed concerns over his series of campaign trail gaffes and jumbled statements.
The protest follows disturbing videos showing police allegedly punching teens on a transit platform and storming a subway car with guns drawn.
A campaign spokesperson said "we do not see a viable path to victory if he does not secure a spot at the November debate."
The Democratic debate candidates were not asked about climate change or immigration. "But you know, Ellen," Julian Castro tweeted.
WHAT'S HAPPENING
He was the first candidate at this week's Democratic debate to bring up Atatiana Jefferson, a Black woman killed in her own home by a white police officer.
Three white candidates are dominating the Democratic presidential primary while Kamala Harris, Cory Booker and Julián Castro struggle.
The star-studded sketch, which included Emmy-winning actor Billy Porter, satirized the LGBTQ town hall hosted by CNN earlier this week.
The Texas congressman called out the cable network for identifying him as Julián by pointing out, "I grew a beard. Do I need a face tattoo?"
The presidential candidate talked about the housing crisis while visiting a homeless encampment in Oakland, California.
Beto O'Rourke, Cory Booker, Julian Castro and Elizabeth Warren have all called for Trump to be impeached if he asked for Ukraine's help.