Several candidates criticized Senator Elizabeth Warren’s health care proposal and backed proposals to impose big taxes on the wealthy. : Good morning. This year’s DealBook Summit will feature speakers like Bill Gates, Hillary Clinton, Ginni Rometty of IBM and Makan Delrahim, the head of the Justice Department’s antitrust division. Apply to attend here. (Was this email forwarded to you? Sign up here.) Candidates were pressed on a number of issues at last night’s Democratic presidential debate. But the standout moments involved topics close to the business community.