Trump now urging prosecutors to investigate @MichaelCohen212's father again. Jeanine asks for the name of the father in law. This is a really stunning way for the president to target a private citizen.— Maggie Haberman (@maggieNYT) January 13, 2019
This is witness intimidation, and it can be admitted into evidence to establish consciousness of guilt.
Witness intimidation means the threatening of a crucial court witnesses by pressure or extortion to compel him/her to not to testify. The admissibility of witness intimidation evidence turns on whether the source of the intimidation may be linked to the defendant. Hence, the proponent of the evidence of witness intimidation must connect a defendant with the threat. Without establishing that connection, the evidence concerning witness intimidation is unreliable and therefore inadmissible. Witness intimidation evidence, if linked to a defendant, can be admitted to show a consciousness of guilt. Establishing the defendant as the source of the intimidation provides the necessary reliability for admissibility.