Scott Eisen via Getty Images; Win McNamee via Getty Images
- Nikki Haley has become the first woman in history to win a GOP primary.
- Haley won 19 delegates in the DC primary, beating GOP frontrunner Donald Trump.
- But the victory provides little relief for Haley, who is still trailing far behind Trump.
Former UN Ambassador Nikki Haley may have won her first primary in Washington, DC, but former President Donald Trump still remains firmly in the lead.