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In previous Center Square polls, the president’s eldest son consistently ranked as the clear runner-up to Vance and attracted a sizable share of support from Republican voters.
By March, Trump Jr. drew 19% support while Vance remained steady at 36%.
Rubio appeared to benefit from some of that shifting support.
The outlet noted it did not include Trump Jr. in this latest poll because he recently wrote on social media he has no interest in running in 2028 though he would not rule out a future bid.
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