Story highlights Rep. Tulsi Gabbard said she is "not prepared" to endorse Hillary Clinton for the Democratic nomination

Gabbard told CNN's Wolf Blitzer that there are "a number of issues" she remains concerned about regarding Clinton

Washington (CNN) Hawaii Democratic Rep. Tulsi Gabbard acknowledged Friday that Hillary Clinton is the presumptive Democratic nominee -- but the Bernie Sanders backer isn't ready to support the former secretary of state.

"I think there's a Democratic presumptive nominee at this point," Gabbard told CNN's Wolf Blitzer on "The Situation Room" when asked if she was still supporting the Vermont senator. "There are a number of issues that I remain concerned about, and I look forward to discussing with you again in the future."

Blitzer then asked Gabbard if she was supporting Clinton.

"There are a lot of things that I'm looking at, in particular this issue that she has not moved on at all in this campaign, which is to continue this interventionist regime change policy in Syria that is proving to be so disastrous," said Gabbard, an Iraq War veteran.

When Blitzer pressed Gabbard over whether she thought Sanders should drop out of the race, Gabbard said she was "not going to go there."

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