Red states and blue states - Wikipedia entry with several interesting maps and tables. The last table shows which president won each state from 1972 through 2016. I was surprised to see that in 1984, Reagan won absolutely everywhere except Minnesota and the District of Columbia. Likewise, in 1972, Nixon only lost in Massachusetts and DC.
Maps of the 2016 US presidential election results - maps and cartograms (size adjusted by population), including ones with shades of purple, for the 2016 presidential election.
And for comparison:
2012 election
2008 election
2004 election
How America really voted + maps going back to the 1960’s - Red/Blue cartograms showing the electoral college results from 1964 to 2008.
Maps of the 2016 US presidential election results - maps and cartograms (size adjusted by population), including ones with shades of purple, for the 2016 presidential election.
And for comparison:
2012 election
2008 election
2004 election
How America really voted + maps going back to the 1960’s - Red/Blue cartograms showing the electoral college results from 1964 to 2008.