Hillary ClintonHillary Diane Rodham ClintonGrassley blasts Democrats over unwillingness to probe Clinton GOP lawmakers cite new allegations of political bias in FBI Top intel Dem: Trump Jr. refused to answer questions about Trump Tower discussions with father MORE seemed taken aback and sought to change the subject when reporters asked whether she has spoken with Sen. Elizabeth WarrenElizabeth Ann WarrenOvernight Regulation: Net neutrality supporters predict tough court battle | Watchdog to investigate EPA chief's meeting with industry group | Ex-Volkswagen exec gets 7 years for emissions cheating Overnight Tech: Net neutrality supporters predict tough court fight | Warren backs bid to block AT&T, Time Warner merger | NC county refuses to pay ransom to hackers Avalanche of Democratic senators say Franken should resign MORE (D-Mass.) about being her running mate.

The presumptive Democratic presidential nominee was speaking to reporters as she bought a cold tea at Uprising Muffin Company in Washington, D.C.'s Shaw neighborhood Friday.

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“Have you talked about vice presidential possibilities with Sen. Warren?” one reporter is heard asking in a video tweeted by CBS reporter Hannah Chanpong.

The presumptive Democratic nominee exaggeratedly bobs her head, widens her eyes and then laughs when a few reporters repeat the question. 

“You guys have got to try the cold chai,” Clinton responded, holding up her tea.

Warren met privately with Clinton on Friday morning amid increasing speculation that Clinton will tap her to be her running mate.

The meeting came just one day after Warren formally endorsed Clinton for president.