Of the three leading contenders for VP for Harris, Beshear and Walz i think help Harris more than Kelly, since Kelly has a rather strong stand against Unions which are the backbone of the democratic party and since Harris took over the unions are moving back to her and away from Trump, Kelly might hurt that trend, where Walz and Beshear help her considerably in the rust belt states where her support is weakest, yes their states dont bring the electorial votes that Kellys does but there was no guarntee they would win their states anyway, Kaine did nothing for Hillary, they didnt win Virginia where he was from, democrats dont perform well in the south, and even though Kelly is an honorary Texan that doesnt mean he alone would flip a bright red state like Texas Blue