Boxer and Fiorina in Dead Heat

A Field Poll released Thursday shows U.S. Sen. Barbara Boxer of California locked in a statistical tie with Republican challenger Carly Fiorina.

According to the Associated Press, "The survey found 47 percent of likely voters support Boxer while 44 percent back Fiorina, a gap that is within the poll's margin of error. The result is similar to the last Field Poll, taken in March. That survey showed Boxer with 45 percent support, compared with 44 percent for Fiorina."

Boxer, now in her third term, has earned a 100% rating from the Human Rights Campaign and supports marriage equality. Fiorina (pictured), a former Hewlett-Packard CEO, opposes marriage equality and favors civil unions.

According to the AP, the latest survey shows sharp differences in support based on education levels and age, with Boxer ahead among women respondents, Hispanic, Asian, and black voters, and those with postgraduate degrees.