Corey Lewandowski, Trump's former campaign manager, said Monday on 'The Laura Ingraham Show' that his supporters people want Trump "to be himself," and apply his unique talents to government. Lewandowski suggested that any attempt to change Trump would be met with failure. He suggested that if former Department of Homeland Security Secretary John Kelly wants to be successful as White House chief of staff, he will learn "very quickly… to let Trump be Trump." "[Trump] doesn't want to change. And that's not what the American people voted for. They didn't vote to have Donald Trump change. They voted for him to be himself," he said. He added: "What I think General Kelly is going to bring is discipline to the staff. He's the chief of staff. He's not the chief of the president." "If [Kelly] is able to do his job –which I think he will– which will be limiting the backbiting and the infighting amongst the individuals who are serving inside the administration â€” that is a very, very important thing, and put everybody on one agenda, which is the Trump agenda," Lewandowski explained. More generally he wondered: LEWANDOWSKI: [President Trump] has not had a significant legislative accomplishment yet, which I think is a shame, considering the Republicans control both the House and the Senate and the White House, and they haven't moved that big legislative agenda that they should have done. You couple that with the fact that we have not started building the wall, we do not have tax reform done, we don't have repeal and replace done, we don't have a massive infrastructure spending bill done. And people are starting to question, you know, can anybody truly change a broken Washington, D.C.? "Instead, this president has gotten no credit for [appointing Supreme Court Justice] Neil Gorsuch, no credit for personally injecting himself into the removal of the U.S. citizens sitting in an Egyptian prison that he released, none of the credit for cutting the government regulations and trying to reduce the bureaucracy because [health care reform] is not done yet. And that has to get done. I've been very clear â€” if anybody makes pledges on the campaign trail and they don't fulfill those pledges, they need to be held accountable," Lewandowski added. He also commented on the 'Deep State': "There's also the fault of the administration for not filling all of the vacancies and getting rid of all of the holdovers of the previous administration," Lewandowski said. "And what we have seen is the 'deep state' is very real. And there are many, many, many individuals who continue to serve in senior positions inside the government that were there from the previous administration, and their job is to make sure that this agenda does not move forward. That is very clear. And that is part of the reason why [Trump's] approval numbers are not where they should be."