The younger Walker joined his father last December to support his candidacy, introducing him at an event at Donald Trump's Mar-a-Lago.

Separately, Christian Walker also sold some pro-Herschel Walker merchandise this year through his website, though those items appear to have been removed.

On Twitter this week, he claimed that he largely opted out of his dad's campaign due to how his father was handling his personal baggage.

\"We were told he was going to 'get in front of his past and tell the truth,'\" he wrote. \"You know, before he started lying.\"

ABC News' Lalee Ibssa contributed to this report.

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