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San Antonio Mayor Ron Nirenberg and former Mayor Julian Castro disagree as to whether President Joe Biden should drop out of the presidential race. In an X post on Tuesday evening, Castro said Biden should call it quits. Nirenberg posted a message a few minutes later saying Biden still has his support. Nirenberg has visited the Biden White House several times, and met with Biden earlier this year in Brownsville. Castro was a member of the Obama administration, when Biden was vice-president.