( CNN) David Axelrod, former senior consultant to President obama, strongly criticized President Donald Trump for proposing without proof that former national security consultant Susan Rice may have committed a crime by trying to unmask the names of Trump’s associates who were mentioned in intercepted communications during the Obama administration.

Trump, asked by the Time if he belief Rice committed a crime, responded, “Do I guess? Yes, I think.”

During an interview with Erin Burnett on CNN’s “Outfront, ” Axelrod said the comments were “appalling, but at this phase, likely not surprising.”