I could topple over those stacks of books if you don't move them!
The Mrs. Piggle-Wiggle series is about a small woman who lives in an upside-down house in a lively neighborhood inhabited mainly by children who have bad habits. Mrs. Piggle-Wiggle has a chest full of magical cures left to her by her deceased husband, Mr. Piggle-Wiggle, who was a pirate.
Answer:
This is a dependent clause.
Explanation:
A dependent clause is a group of words that contains a subject and verb but does not express a complete thought. A dependent clause cannot be a sentence.
"In his first year in the White House" does not express a complete thought, making it a dependent clause.