> History supports Republicans filling the seat. Doing so would not be in any way inconsistent with Senate Republicans’ holding open the seat vacated by Justice Antonin Scalia in 2016. The reason is simple, and was explained by Mitch McConnell at the time. Historically, throughout American history, when their party controls the Senate, presidents get to fill Supreme Court vacancies at any time — even in a presidential election year, even in a lame-duck session after the election, even after defeat. Historically, when the opposite party controls the Senate, the Senate gets to block Supreme Court nominees sent up in a presidential election year, and hold the seat open for the winner. Both of those precedents are settled by experience as old as the republic.
The linked article actually goes on to describe every situation where there was an election year Supreme Court vacancy. Please read.