( CNN) The Russia probes circling Donald Trump move ever closer to the President Thursday, as his own flesh and blood, in the person or persons of his oldest son, appears for an interview before staffers of a key congressional committee.

The cloud formed by claims that members of Trump's White House campaign colluded with a Russian election meddling operation has been eaten in recent days by the murderous gales and tides of multiple Atlantic hurricanes.

But with Congress back at work after the summer recess, the pace of its probes into the Russia effort is accelerating, even as Special Counsel Robert Mueller methodically plods ahead with his own investigation.