Presidents who visit / argue a case - interpretation before the Supreme Court (D.C.)

 The jurist-politician

who best exemplifies

the interaction of the

Executive branch and

the Judicial branch of 

our Constitutional government

is

William Howard Taft.

Those others who have sworn

in Justices / Chief Justice of

Supreme Court include

TRUMP for "his" justices

Gorsuch & Kavanaugh as well as

Richard Nixon in 1969.

Those lawyer-presidents who 

made a legal argument / advocated

in a specific case before the Court were:

John Quincy Adams

Abraham Lincoln

James Garfield

Grover Cleveland

Benjamin Harrison

 + TAFT.

_______________________

OUTLIER

non-lawyer

Donald John Trump is the first

POTUS to attend an oral argument

during a daily session of the SCOTUS.