The SCOTUS argument is bogus when you look at the reality on the ground. Most of the major outrages of the Supreme Court since the prayer decision of the early 1960’s had Republican appointed Justices involved in negating parts of the Constitution. Examples of Republican appointees trashing the Constitution:
Earl Warren, 1963 ruling to ban prayer in the public schools
Harry Blackmun 1973 Roe v Wade ruling on the abortion issue
Anthony Kennedy 1986 homosexual rights decision
Sandra Day O’Connor 1989 decision refusing to overturn Roe v Wade
David Souter 1992 Abortion Right decision
John Paul Stevens 2005 Takings clause decision undermining property rights
John Roberts outrageous 2012 Obamacare decision
There are many other examples of Republican appointees undermining the Constitution but the above will suffice in making the point that Republican appointees are helping in the destruction of the Republic.