https://www.washingtonpost.com/news/wonk/wp/2016/07/01/the-interesting-thing-that-happens-when-a-republican-marries-a-democrat/...For both Republicans and Democrats, for example, being married to an independent tends to depress the person’s vote significantly more than being married to a person on the opposite side of the political spectrum. “Being married to an independent, it brings down the turnout of the partisan, and it never brings up the turnout of the independent,” he says.
...for example, a Democrat married to an independent or member of a third party was 13 percent less likely to vote than a Democrat married to another Democrat...

...As the graphic shows, being married to someone of a different party appeared to affect the vote of Republicans much more than Democrats, for unknown reasons.

“Depending on whether you’re a Democrat, or a Republican or an independent, the effects vary a lot,” Hersh said. “And they’re particularly strong for Republicans. A Republican married to a Democrat was 10 percentage points less likely to vote than a Republican married to a Republican. But a Democrat married to a Republican was only 3 percentage points less likely to vote than a Democrat married to a Democrat.”...

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