Why would a single's antislavery platform be a catalyst to ushering in a new political party?

A single's antislavery platform could galvanize a diverse coalition of individuals and groups who share a common commitment to ending slavery, uniting them under a focused political agenda. This collective effort might attract former Whigs, Free Soilers, and abolitionists, allowing for the formation of a new political party that prioritizes moral and social justice. By addressing a pressing national issue, this platform could effectively mobilize grassroots support and challenge the existing political landscape, leading to significant electoral change. Ultimately, it would serve as a rallying point for those disillusioned with the status quo, creating a powerful movement for reform.