Thus, DOJ's present assertion that the absolute testimonial immunity that senior-level presidential aides possess is, ultimately, owned by the President, and can be invoked by the President to overcome the aides' own will to testify, is a proposition that cannot be squared with core constitutional values, and for this reason alone, it cannot be sustained.To make the point as plain as possible, it is clear to this Court for the reasons explained above that, with respect to senior-level presidential aides, absolute immunity from compelled congressional process simply does not exist.