State-sponsored Russian hackers appear far more interested this year in demonstrating that they can disrupt the American electric utility grid than the midterm elections, according to United States intelligence officials and technology company executives.

Despite attempts to infiltrate the online accounts of two Senate Democrats up for re-election, intelligence officials said they have seen little activity by Russian military hackers aimed at either major American political figures or state voter registration systems.

By comparison, according to intelligence officials and executives of the companies that oversee the world’s computer networks, there is surprisingly far more effort directed at implanting malware in the electrical grid.