The recording that emerged on Friday revealing Donald J. Trump speaking in vulgar and demeaning terms about women prompted extraordinary backlash from Democrats and Republicans, raising questions about whether the Republican Party could dump its nominee at the last minute and find someone more viable a month before Election Day.

While the idea of replacing Mr. Trump has been a fantasy for some “Never Trump” Republicans for months, the reality is that removing him from the ticket at this point would be exceedingly complicated.

Here’s a look at some of the questions that Republicans are mulling.

Is it too late for Republicans to replace Trump?

“It’s the equivalent of a triple bank shot, really,” said Benjamin Ginsberg, a lawyer at Jones Day who was national counsel for the presidential campaigns of Mitt Romney and George W. Bush.

Mr. Ginsberg said that the Republican Party did not have a mechanism to replace a nominee just because it wants to. The party’s rules state that “the Republican National Committee is hereby authorized and empowered to fill any and all vacancies which may occur by reason of death, declination, or otherwise of the Republican candidate for president of the United States.”