The Obama administration is weighing new steps to bolster the security of the United States’ voting process against cyberthreats, including whether to designate the electronic ballot-casting system for November’s elections as “critical infrastructure,” Jeh Johnson, the secretary of Homeland Security, said on Wednesday.

In the wake of hacks that infiltrated Democratic campaign computer systems, Mr. Johnson said he was conducting high-level discussions about “election cybersecurity,” a vastly complex effort given that there are 9,000 jurisdictions in the United States that have a hand in carrying out the balloting, many of them with different ways of collecting, tallying and reporting votes.

“We should carefully consider whether our election system, our election process is critical infrastructure, like the financial sector, like the power grid,” Mr. Johnson told reporters in Washington. “There’s a vital national interest in our electoral process.”

A national commission created as part of a voting overhaul enacted in 2002 in response to the controversy surrounding the 2000 presidential election “raised the bar” on security, Mr. Johnson said. “But there is more to do,” he added. “The nature of cyberthreats has evolved.”