I doubt Ginsburg or Breyer will retire until after the midterms, they may not retire until after 2020. Actuary tables show they have several years to go on average lifetime, and they have better healthcare than the vast majority of Americans.
Even with Kennedy I doubt Trump will be able to successfully nominate and see seated a Supreme Court Justice unless the process is completely done by this November. The GOP was able to block Garland and the Dems will use that as an excuse to block any Trump nomination without GOP majority in Senate and nuclear capability on filibuster. When we say two year sis unprecedented, they will say blocking garland so long was also unprecedented and two can play that game
Even with Kennedy I doubt Trump will be able to successfully nominate and see seated a Supreme Court Justice unless the process is completely done by this November. The GOP was able to block Garland and the Dems will use that as an excuse to block any Trump nomination without GOP majority in Senate and nuclear capability on filibuster. When we say two year sis unprecedented, they will say blocking garland so long was also unprecedented and two can play that game