TODAY | September 01, 2013
>>> disagree on the hot button issue of gay marriage with one saying the other is, quote, dead wrong in her beliefs. luke russert has more.
>> reporter: two sisters from one of the country's most notable political families at odds for all to see. responding to what she says was a misleading poll, wyoming senate candidate liz cheney has made it clear in recent days she is not pro-game marriage. adding in a statement, i believe the issue of marriage must be decided by the states and by the people in the states. that is not sitting well with younger sister mary cheney who is gay and married her longtime partner last year. she wasted little time firing back writing on facebook, for the record, i love my sister, but she is dead wrong on the issue of marriage. adding, freedom means freedom for everyone, and that means all families -- regardless of how they look or how they are made. as for the sisters' famous father, the usually conservative dick cheney , he echos mary's view, advocating for equal rights on abc's "the view" in 2007 .
>> i think freedom means freedom for everybody and they ought to have the right to make whatever choice you want to make with respect to your own personal situation.
>> reporter: the infighting is another twist in a senate primary race that has garnered national attention.
>> what's fascinating about the family dynamic is that it sort of symbolizes the broader rift that's playing out right now in the republican party between those who support gay marriage and those who don't support gay marriage .
>> reporter: two outspoken women on different sides of a hotly contested issue. for "today," luke russert , nbc news, los angeles .