“Lewandowski in recent months has been encouraged to repair relationships with officials at the RNC, whose work he had previously trashed, in order to become more involved in the party’s 2018 strategy,” a source told BuzzFeed News.

“Lewandowski’s cameo at the Michigan rally was not a one-off, spontaneous event, according to a source close to the president who is involved in 2018 strategy. The plan is to have the former campaign manager travel more with the president for rallies ahead of November’s elections. He’s already made some appearances at events with Vice President Mike Pence, as he travels the country selling the tax code overhaul to voters.”

Former Trump campaign manager Corey Lewandowski told NBC News that he never approved Cambridge Analytica’s contract.

Said Lewandowski: “They did not work for the campaign when I was the manager… They pitched me three times, three times I said no. They did not come to the campaign until after I left.”

He also said he had not been subpoenaed by special counsel Robert Mueller: “I can say that during my tenure… which is all I can speak to, I saw no Russians.”

Christopher Wylie, a former employee of British-based company Cambridge Analytica, told NBC News that the company misused personal Facebook data of some 50 million people.

Said Wylie: “I left Cambridge Analytica before it joined the Trump campaign. What I do know is that Cambridge Analytica was meeting with Corey Lewandowski in 2015 before Trump had even announced.”

“Corey Lewandowski is scheduled to take questions next week from congressional investigators looking into possible collusion between the Trump campaign and the Kremlin,” the Daily Beast reports.

“Lewandowski is one of several witnesses the House intelligence committee plans to interview as part of its Trump-Russia investigation. Reached for comment, Lewandowski indicated he will take questions, rather than pleading the fifth as other witnesses have done.”