Edit in JSFiddle

$(document).ready(function () {
    $.ajax({
        type: "GET",
        url: "https://mysafeinfo.com/api/data?list=presidents&format=xml&rows=5&sort=id desc&case=lower",
        dataType: "xml",
        success: function (result) {
            $(result).find("p").each(function () {
                $("#presidents").append($("<option />").val($(this).attr("id")).text($(this).attr("fullname")));
            });
        }
    });
});

<select id="presidents"></select>