Independents:
GOP-leaning Independents that were going to vote for Trump will likely still vote for Haley if for some reason she does get the nomination. GOP-leaning Independents that weren't going to vote for Trump may decide vote for Haley even if she does say she'll pardon Trump if convicted...because they generally prefer GOP policies to Dem Policies...they just didn't want another 4 years of President Trump.An overwhelming majority of independents (81%) continue to “lean” toward either the Republican Party or the Democratic Party. Among the public overall, 17% are Democratic-leaning independents, while 13% lean toward the Republican Party. Just 7% of Americans decline to lean toward a party, a share that has changed little in recent years. This is a long-standing dynamic that has been the subject of past analyses, both by Pew Research Center and others.
In their political attitudes and views of most issues, independents who lean toward a party are in general agreement with those who affiliate with the same party. For example, Republican-leaning independents are less supportive of Donald Trump than are Republican identifiers. Still, about 70% of GOP leaners approved of his job performance during his first two years in office. Democratic leaners, like Democrats, overwhelmingly disapprove of the president.
Dem-leaning Independents were not likely to vote for Haley or Trump anyway... so the possibility of her Pardoning Trump if he is convicted isn't really a factor for them.