Democratic Primaries

Picking rivals for Veep was pretty common until the 12th amendment. And the practice continued off and on since.

2008 (D): Obama / Biden
2004 (D): John Kerry and John Edwards
1996 (R): Bob Dole and Jack Kemp
1980 (R): Ronald Reagan and Bush I
1968 (R): Nixon / Agnew
1960 (D): John Kennedy and Lyndon Johnson
1956 (D): Adlai Stevenson and Estes Kefauver
1948 (R): Thomas Dewey and Earl Warren (Warren was a favorite-son candidate)
1944 (R): Thomas Dewey and John Bricker
1936 (R): Alf Landon and Frank Knox
1932 (D): Franklin Roosevelt and John Nance Garner
1928 (R): Herbert Hoover and Charles Curtis
1916 (R): Charles Evans Hughes and Charles Fairbanks
1912 (D): Woodrow Wilson and Thomas Marshall (Marshall was a favorite-son candidate)

1800s? Just didn't feel like doing the research.

You later moved the goal post to say losing tickets don't count.

And you later said political parties didn't exist in the late 1700s. EVERY president has been nominated for the office.

Your grasp of history is an epic fail.