The ease with which minor parties can secure representation in the Senate compared to the House of Representatives has meant that these parties have often focused their efforts on securing representation in the upper house .
The House of Representatives is a result of proportional representation in the Senate .
The ease with which minor parties can secure representation in the Senate compared to the House of Representatives , a result of proportional representation in the Senate , has meant that these parties have often focused their efforts on securing representation in the upper house .