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Rep. Joaquin Castro, R-Texas, talks with attendees at an Elizabeth Warren event Jan. 22, 2020, as he campaigns for then-Democratic presidential candidate Sen. Elizabeth Warren, D-Mass, in Denison, Iowa. (AP/Sue Ogrocki)
Rep. Joaquin Castro, R-Texas, talks with attendees at an Elizabeth Warren event Jan. 22, 2020, as he campaigns for then-Democratic presidential candidate Sen. Elizabeth Warren, D-Mass, in Denison, Iowa. (AP/Sue Ogrocki)