This question is impossible to answer from a historical perspective because any answer you get will be little more than speculation.

Sorry, but your submission has been removed because we don't allow hypothetical questions. If possible, please feel free to rephrase the question so that it does not call for such speculation, and resubmit Otherwise, this sort of thing is better suited for /r/HistoryWhatIf.

You might want to take this to /r/historywhatif. Reconstruction might have been very different if Lincoln had lived, but it's hard to say exactly how. Counterfactual history like this is vague, difficult, and doesn't technically belong on this sub. That's not to say it's not an interesting question, though.