Donald Trump has exposed Marco Rubio

In the late stages of his doomed presidential campaign, Sen. Marco Rubio declared that the front-runner for his party's nomination was "a con artist." But it turns out that Donald Trump wasn't the only GOP presidential candidate pulling the wool over people's eyes.

On Thursday, Rubio took another step toward fully embracing Trump for the presidency by telling CNN's Jake Tapper that he not only planned to attend the Republican convention, but that he would be "honored" to speak on Trump's behalf.

"Look, my policy differences with Donald Trump — I spent 11 months talking about them. So I think they're well understood," Rubio told Tapper. "That said ... I don't want Hillary Clinton to be president. If there's something I can do to help that from happening, and it's helpful to the cause, I'd most certainly be honored to be considered for that."

Rubio's assaults on Trump during the primary season were about more than "policy differences." In addition to repeatedly calling Trump a "con artist," Rubio: predicted that a Trump presidency would bring "chaos"; said Trump was "wholly unprepared to be president"; and warned about handing over control of the U.S. nuclear arsenal to an "erratic individual" and a "lunatic."

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