It is a time-honored tradition in U.S. politics: wealthy people burning through their fortunes to ultimately lose an election.

© Haiyun Jiang for The New York Times

Ms. Shanahan, who has fueled Robert F. Kennedy Jr.’s campaign financially since becoming his running mate, has now poured nearly $15 million into the long-shot effort to elect him president.

© Jordan Vonderhaar for The New York Times

The Silicon Valley lawyer, chosen by Robert F. Kennedy Jr. as his running mate, made her first solo outing on the stump. She is to appear alongside him at a rally on Monday in Austin, Texas.

© Jim Wilson/The New York Times