The addition of ethanol, which is fully miscible in water yet, less polar than Water reduces its solubility. This reduction of solubility results in precipitation of least soluble salts first or the salt which is not soluble in solvents less polar than water.
Pole pockets on banners are something that can cause a bit of confusion. This is compounded by the fact that some companies do things differently when producing banners with pole pockets.
Most of these flags, as Heritage's Web site points out, feature merely a campaign slogan or a central portrait of the candidate, but this banner shows the candidate in front of a log cabin, with a barrel of hard cider being tapped alongside it.