During the 1850s the decline and demise of the Whig Party allowed the birth and development of the , which rapidly grew in power in the northern states, in part due to its seasoned political leaders.

During the 1850s the decline and demise of the Whig Party allowed the birth and development of the Republican Party which rapidly grew in power in the northern states, in part due to its seasoned political leaders.

Explanation:

As it happened with other parties, the issue of slavery created many division within the Whig Party and they ultimately led to a its decline and loss of influence. The passing of the Kansas-Nebraska Act was the definite reason for irreconcilable division. Some old Whigs went to found the Republican Party.