I reiterate that "impeached" means to be convicted of charges levied in (an) article(s) of impeachment.

Article 2, Section 2, Clause 1[1] of the Constitution (also cited in your links) states (emphasis mine):

>[The President] shall have Power to grant Reprieves and Pardons for Offences against the United States, except in Cases of Impeachment.

For there to even be a question of a presidential pardon applying to impeachments that necessitated such a clause, being impeached implies being convicted. The Justice Department considers pardons without convictions as "highly unusual"[2].

I thus reiterate: There has never been an impeached President to date, and the use of the term "impeached" to mean a President merely tried for impeachment is very misleading. Again, you don't call someone merely tried for (let alone acquitted of) murder a murderer.

Disclaimer: IANAL.

[1]: https://en.wikipedia.org/wiki/Article_Two_of_the_United_Stat...

[2]: https://www.justice.gov/pardon/frequently-asked-questions