Constitutionally, as you have recognized, the House has the sole power of impeachment.

Each house has the sole power to by the judge of the legal capacities of its members.

He had the sole power to select his own assistants, and to grant them their powers.

The Senate plan would give the mayor the sole power to hire a schools chancellor, who is now selected by the board.

"It did not receive the approval of Congress, which has the sole power to declare war."

The Senate also has the sole power to try impeachments.

Do they have the sole power to define its content?

A man whose sole power is that his skin is bright blue.

The House chose its speaker and had sole power of impeachment.

I also understand that your uncle was invested with sole power and authority, without any right of oversight by you or anyone else.