Other posters have mentioned that there's historically been a lot of voter suppression in the US, which has led to a lot of people being against anything that would make voting harder ("ask for a proper ID with photograph").
However there is another more cynical thing going on, which is that in recent times the pro-voting-rights Democratic party has also benefited electorally from the increased turnout resulting from looser voting rules. This has made any changes to voter ID laws impossible to pass federally (where they are currently set).
This situation is changing now though because polling and the last election suggest that increased turnout currently benefits Republicans. Many commentators believe that within a year the Democratic party will actually be agnostic on voting ID laws, and already in this election you can see that "getting out the vote" is not much of a Democratic talking point.
However there is another more cynical thing going on, which is that in recent times the pro-voting-rights Democratic party has also benefited electorally from the increased turnout resulting from looser voting rules. This has made any changes to voter ID laws impossible to pass federally (where they are currently set).
This situation is changing now though because polling and the last election suggest that increased turnout currently benefits Republicans. Many commentators believe that within a year the Democratic party will actually be agnostic on voting ID laws, and already in this election you can see that "getting out the vote" is not much of a Democratic talking point.