GSS, abortion, and working-class whites
For years 2004-2014, the General Social Survey says that 38.1% of working-class (no Bachelor’s degree) non-Hispanic whites and 56.4% of college-graduate non-Hispanic whites believe than a woman should be able to have an abortion for any reason.
Those percentages increase to 78.7% and 82.9% for when the pregnancy was a result of rape. So Scott Walker’s extreme position in which he opposes legal abortion even when the woman is raped is way outside the mainstream.
Among white working-class voters, those who support abortion for any reason voted 58.0% for Obama, and those who do not support abortion for any reason voted 58.8% for McCain (in the 2008 election).
The difference is much more dramatic for college-educated white voters. Those who support abortion for any reason (the majority) voted 69.8% for Obama, and those do not support abortion for any reason voted 68.5% for McCain.
I would say this means that abortion is a more important issue to educated voters and is probably what is preventing Republicans from winning national elections; they are losing the college-educated white vote because of this.
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It’s rather ironic that non-Hispanic whites are more pro-choice than either non-Hispanic blacks or Hispanics, yet whites are most likely to vote Republican despite the Republicans being the pro-life party.