Mr. Hogg said he would not run again for vice chair after the party voted for a new election. Democrats have been furious at his plan to challenge the party’s sitting lawmakers in primary races.
David Hogg said two months ago that he planned to spend millions of dollars on primary elections through a separate group he leads, aiming to bring generational change to the Democratic Party.
Mr. O’Neal, a correspondent for The Economist, will be in charge of championing “personal liberties and free markets,” the section’s new direction laid out by Jeff Bezos.
The health secretary cited financial conflicts, but a White House official and someone familiar with his thinking said he was also concerned about ties to Democrats.