Both a countywide sales tax increase and a separate sales tax hike proposed within the city of San Diego were falling short of the support needed to pass in early election returns.

Measure E, San Diego's one-cent sales tax increase for general city services, is trailing in early results, but the race remains too close to call. Why it matters: The city last year balanced its budget by using one-time revenue sources to pay for ongoing expenses,

San Diegans will have several ballot measures to vote on when they go to the polls Tuesday, and while two of the measures are on relatively technical issues, one could increase the sales tax to raise $400 million for city infrastructure needs.