So a person can just make empty promises on a campaign, get elected and do a bunch of crap people disagree with via executive order, and then blame all the stuf

So a person can just make empty promises on a campaign, get elected and do a bunch of crap people disagree with via executive order, and then blame all the stuff he didn't do on Congress? edit: And yes, informed voters should know what the President can and can not reasonably promise, but I would hope that presidential candidates would actually have the integrity to not intentionally mislead people, and that a person who promises to close Gitmo would at least be more outspoken about his desire to do so.