it was pretty low (5.1-6.8%) until McGovern in 1968 when it spiked to 9.7%. It remained above 8.4% until it peaked at 1984 at 11%, and remained high in 1988. Since then it's been 4.7 (1996) - 6.9% (1992) range. Last year it was 5.9%. This year, so far based on results received, it's 3.8% - the lowest on record.
Edit: It's even lower in Michigan and Georgia, 2% in Michigan and 2.2% in Georgia.
Edit 2: Low means very few votes which voted for President but not the House.
it was pretty low (5.1-6.8%) until McGovern in 1968 when it spiked to 9.7%. It remained above 8.4% until it peaked at 1984 at 11%, and remained high in 1988. Since then it's been 4.7 (1996) - 6.9% (1992) range. Last year it was 5.9%. This year, so far based on results received, it's 3.8% - the lowest on record.
Edit: It's even lower in Michigan and Georgia, 2% in Michigan and 2.2% in Georgia.
Edit 2: Low means very few votes which voted for President but not the House.