House leaders are more powerful than senate leaders because of the larger size of the house.
Explanation:
The parliament of the United States consists of two divisions that together make up the United States Congress. One division is called the 'House of Representatives' and the other is called the 'Senate'.
In terms of the number of members, the House (with 435 members) is larger in size than the Senate (with 100 members). Thus, the House has a dominant say in the governance and is hence considered to be more powerful than the Senate.