See example at http://immutables.pl/2016/03/01/32-things-to-do-before-production-deployment/

embedded tweet with extended width

$(document).ready(function() {
  window.twttr = (function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0], t = window.twttr || {};
    if (d.getElementById(id)) return t;
    js = d.createElement(s);
    js.id = id;
    js.src = "https://platform.twitter.com/widgets.js";
    fjs.parentNode.insertBefore(js, fjs);

    t._e = [];
    t.ready = function(f) {
      t._e.push(f);
    };
   
    return t;
  }(document, "script", "twitter-wjs"));

  twttr.ready(function(twttr) {
    $(".tweet").each(function() {
      twttr.widgets.createTweet($(this).data("id"), $(this)[0], {cards: "hidden"}).then(function(el) {
        $(el).contents().find('.EmbeddedTweet').css('max-width', '800px');
      }); 
    });
  });
});

<div class="tweet" data-id="705128887810965504"></div>