According to a poll from Marquette taken a few days before Justice Ruth Bader Ginsburg’s death, the vast majority supported holding hearings for a nominee if a vacancy opened in the Supreme Court.
Per Marquette “The question of holding hearings and a vote on confirming a new justice immediately became an issue with Justice Ginsburg’s death, as it had following the death of Justice Antonin Scalia in 2016. In this poll, conducted in the days before Ginsburg’s death, a substantial majority of respondents of both parties say that if a vacancy occurred during the 2020 election year, the Senate should hold hearings on a nominee, with 67 percent saying hearings should be held and 32 percent saying they should not be held.”
The report adds “Views on holding hearings do not vary much by partisanship, as shown in Table 3. This table will provide a baseline from before there was a vacancy against which to measure any future change in partisan views, if a nomination is made and considered.”
NPR reported that Justice Ginsburg said days before she died that her “most fervent wish is that I will not be replaced until a new president is installed.”