When President Obama lashed out at Sen. Elizabeth Warren, D-Mass., recently, it was about more than just a trade deal. His comments revealed that he is increasingly jealous.

Obama has long envisioned himself as a transformational liberal leader. But as he enters the twilight of his presidency, he’s being forced to grapple with the fact that his party has begun to move on, and liberals are increasingly looking to Warren as their champion.

Back during his 2008 campaign for the Democratic nomination, Obama famously said, “I think Ronald Reagan changed the trajectory of America in a way that, you know, Richard Nixon did not and in a way that Bill Clinton did not.” He saw himself as the liberal answer to Reagan — a charismatic leader who could not only win elections, but move the country ideologically. He wanted to get Americans to embrace a larger role for government as an antidote to the skepticism in big government that Reagan helped foster.