If you look at work from Bueno de Mesquita, Smith and others, you might become convinced that Americans force their leaders to support democracy despite the cost to the interests of the people and the leaders.
That’s not the same issue. Americans like democracy at home. They don’t care about it abroad.
See Costa Rica in 1948, Syria in 1949, Iran in 1953, the Philippines in 1953, Guatemala in 1954, Lebanon in 1957, Brazil in 1964, Indonesia in 1965, Chili in 1973, Argentina in 1976, Haiti in 1991, Palestine in 2006 and I’m probably forgetting some. And that’s just the coups toppling democratically elected leaders by the way. If you add support for authoritarian regimes and meddling in elections the list is far longer.
I wasn't clear; the argument of the authors above is that American voters force American leaders to support democracies abroad.
That is, absent voter pressure, American leaders would support dictators and autocrats at a rate as high as and support free elections as little as Putin. Instead, they support and encourage free and fair elections in countries, like some you've listed, where the outcomes are sure to be bad for American interests.
If the outcomes are bad enough to American leaders' eyes, then the leaders may use covert action, but they cannot use overt actions to install a dictator abroad without risking severe electoral damage at home. Just think about the effort put into trying to create democracies in Afghanistan and Iraq, and how much easier and more stable (for American interests or at least Cheney's) installing an friendly military dictator with 97.7% support in a sham election would have been.
Of course, many Americans believe other Americans don't care enough about democracy abroad, but that suggests at least some do.
See Costa Rica in 1948, Syria in 1949, Iran in 1953, the Philippines in 1953, Guatemala in 1954, Lebanon in 1957, Brazil in 1964, Indonesia in 1965, Chili in 1973, Argentina in 1976, Haiti in 1991, Palestine in 2006 and I’m probably forgetting some. And that’s just the coups toppling democratically elected leaders by the way. If you add support for authoritarian regimes and meddling in elections the list is far longer.