There are a significant number of Reps who put country before party. I always did (and still do, though I'm not a registered Rep anymore). Nationwide, there are many speaking out.

npr.org - Republicans for harris coalitions have launched in several swing states

azfamily.com - Republican mayor mesa voice support kamala harris dnc (local mayor from Mesa...this is one of several available links)

azmirror.com - Republicans line up to support ruben gallego and kamala harris (this one includes down-ballot because Lake is a Trumpie, and is not doing well in some polls)

I'm actually having to fight optimism here. The convict has made the Rep party toxic, and many Reps are finding it too repugnant to support the party as long as the convict and his acolytes hold sway. It makes me think Harris can win. But we already know that the GA election committee is Trumpie; questioning the 2020 results (again), and I do not trust them to administer a fair election because of their counterfactual bias. As just one example.

Of course, Harris in the latest Fivethirtyeight is leading nationally about about 4%. In key swing states it's within margin of error (where before the convict was leading Biden handily).