Kansas Rep. Tim Huelskamp, a Republican, on Monday claimed that a Supreme Court ruling on gay marriage effectively legalized polygamy.

Last month, the Supreme Court released two decisions related to gay nuptials. One gutted the Defense of Marriage Act (DOMA), while the second led to the end of Proposition 8.

Huelskamp's immediate reaction was to propose a federal amendment defining marriage as a heterosexual union. The bill was introduced in the House with 28 Republican co-sponsors.

(Related: Tim Huelskamp's proposed federal gay marriage ban has 28 co-sponsors.)

During an appearance on Janet Mefferd's radio show, Huelskamp called Justice Anthony Kennedy's decision on DOMA “outrageous.”

“If you're writing for the Left and you're not gonna follow the Constitution you have to make it up as you go along so you inject name-calling into a constitutional decision,” Huelskamp said. “I mean that's an outrageous decision.”

He went on to criticize Chief Justice John Roberts' ruling on Proposition 8 as “crazy.”

“What's the impact on our children? That's what the Left doesn't care about,” he said. “Just because two or three adults desire one thing that doesn't mean it's best for our children.”

Huelskamp argued that the DOMA decision effectively allows parents to marry their same-gender children, adding that “polygamy should be allowed under this decision.”