Lowry beat me to the punch on this subject. A few other findings of note: As Karlyn Bowman and Jennifer Marsico note in this review of public opinion on patriotism and military service, Republicans have traditionally been more likely than Democrats to describe themselves as “extremely proud” of the United States. In January 2001, for example, 62 percent of Republicans and 52 percent of Democrats gave that self-description to Gallup; in June 2013, 71 percent of Republicans and 56 percent of Democrats gave it.

I haven’t seen many numbers on whether Americans regard Democrats as less patriotic than Republicans. Fox News did a poll in December 2011 asking registered voters whether they thought various adjectives accurately described Barack Obama, Mitt Romney, and Newt Gingrich; “patriotic” was among the adjectives. Obama’s patriotism was affirmed by 60 percent of respondents, Gingrich’s by 71 percent, and Romney’s by 75 percent.

Dana Blanton, Fox’s vice president for public opinion research, provided me with further data about these questions: I wanted to see how much Obama’s lower numbers reflected Republican unwillingness to call him patriotic. That does seem to be the biggest contributor. Very similar percentages of Republicans and Democrats vouched for the patriotism of their own party’s leaders: 86 percent of Democrats said Obama is patriotic and 87 percent of Republicans said Romney is. But 65 percent of Democrats said the same about Romney, compared to 32 percent of Republicans who did about Obama.

But independents were also less likely to call Obama a patriot (56 percent) than to say it of Romney (74 percent). And Democrats were also more likely to call Obama unpatriotic (14 percent) than Republicans were to call Romney unpatriotic (7 percent).