Gabbard and Robert F. Kennedy Jr., both former Democrats, have emerged as the Trump campaign’s most visible national surrogates in his bid to win over undecided Democrats and independents. The campaign has been slow to embrace other would-be allies, including Haley, who issued her first fundraising appeal on Trump’s behalf just last week.

The race between Kamala Harris and Donald Trump has blurred traditional party lines as both candidates adopt policies that appeal to the opposing party's base. Harris is focusing on gun ownership and border security,