Clinton Says Russia Is 'Grooming' A Democrat For A Third-Party Run

The transcript discusses a political controversy involving Hillary Clinton and Tulsi Gabbard. Clinton implied that a Democratic primary candidate, suspected to be Gabbard, is favored by Russia. Gabbard responded on Twitter, criticizing Clinton and challenging her to join the 2020 Democratic primary race. Clinton's spokesman dismissed Gabbard's response as divisive and filled with conspiracy theories.

What does Gabbard suggest Clinton should do in relation to the 2020 Democratic primary?

What was the reaction of Clinton's spokesman to Gabbard's statements?