I'm honestly a little torn on this particular issue. I generally think that a cas like this should comprise "fair use", but of course this also reminds me of other cases where Republicans have tried to use other artists' music without permission. Clearly, they've misinterpreted some of the lyrics. The most famous example is perhaps Ronald Reagan using Bruce Springsteen's "Born in the U.S.A." (not a patriotic anthem, but a song about the effects of the Vietnam War on a soldier) in his 1984 re-election campaign. Anyway, here's the article.
