I'm not so sure that I believe there is any truth to this. What I am inclined to believe is that this is Trump's excuse for announcing no deportation. IOW, Trump found a scapegoat. He's already postponed the deportations for two weeks and that was before this came out!
DHS boss McAleenan accused of opposing, leaking planned ICE raidsActing Homeland Security Secretary Kevin McAleenan is being accused of leaking plans last week for scheduled Immigration and Customs Enforcement (ICE) raids, after expressing fierce opposition and allegedly ordering top officials to “stand down†on the operation.
A source familiar with the matter told Fox News that when the operation was in its planning phase two weeks ago, McAleenan ordered ICE Acting Director Mark Morgan to call off the deportation operation that was expected to target 2,000 families in up to 10 cities across the country. President Trump, however, ordered that Morgan continue as planned -- until he abruptly announced Saturday he was delaying the raids to see if Congress could work out a solution to the "Asylum and Loophole problems at the Southern Border."........
https://www.foxnews.com/politics/mcaleenan-accused-leaking-ice-raids