Why are you expecting Ginsberg to go voluntarily during a Republican (even though increasingly in name only) administration?
Because she’s 84 and can’t stay awake.
She’s had health problems and has hinted at her desire to retire.
Waiting around for 2021 in hopes of a Dem in the White House doesn’t look like an option.
Hoping for a 2018 Senate majority to be seated in 2019, isn’t much better.