And the fact that it's not up to the Senate. US Const., Art. I, Sec. 2, Cl. 5.
The House of Representatives shall choose their speaker and other officers; and shall have the sole power of impeachment.
And then under Section 3, regarding the Senate: "The Senate shall have the sole power to try all impeachments. When sitting for that purpose, they shall be on oath or affirmation."
Which just serves as a reminder of just a few years back with the impeachment fiasco of X42. The House serves somewhat like a "Grand Jury" by deciding that charges are in fact justified. The Senate acts as the "final jury".