That's not true.
Senate Republican Primary Election Results, Maryland, 1992:
I guess you'll find this pretty meaningful.James H. Berry 3% John J. Bishop 4% Joseph I. Cassily 8% Joyce Friend-Nalepka 3% Herman J. Hannan 1% Stuart Hopkins 2% *Alan L. Keyes 46% Martha S. Klima 10% William H Krehnbrink 1% Scott L. Meredith 2% Ross Z. Pierpont 6% Edward R. Shannon 2% S Rob Sobhani 6% Romie A Sonqer 3% Eugene R Zarwell 3%Mr Keyes had 95,706 votes or 46 percent in the Republican contest with all 1,593 precincts reporting. His nearest challenger in the 15 candidate field was Baltimore County state Del. Martha Klima who received 20,075 votes or 10 percent.
I'm not sure I'd call waxing the likes Martha Klima and Eugene R. Zarwell "meaningful".
I'll grant Keyes won a primary -- which was indeed news to me. But does that really mean anything. Because nobody outside of family and neighbors ever heard of the other 14...