The party was the most consistent advocate of human rights, democratisation and free market economics in parliament.
Mr Abdula'al said that the national interest required closing the human rights file for good, between the leadership, the government and those affected.
Another prominent member is lawyer Fareed Ghazi MP, who is also an activist with the Al Muntada liberal think tank.
Fareed Ghazi has urged liberals against imposing their will on a conservative public, adding that it was not the right approach politically and morally.
"We should find a common ground with the conservative element rather than just sit on a high horse and tell them that our way is the right way," he said.