No, not Russia, but Mexico has interfered in U.S. elections for decades. Thus says the Diplomad, and he should know:
Is there foreign interference in our elections? You bet.
The biggest offender? Not Russia, but Mexico. Mexican officials publicly called on Mexicans in the US to oppose Trump; Mexico’s over fifty–yes, fifty–consulates in the US (here) are hot beds of political activity and activism. Millions of illegal and legal aliens largely from Mexico and Central America vote, yes vote. We need to have an in-depth investigation into Mexico’s interference in our elections, an interference that goes well beyond revealing embarrassing DNC texts.
His ideas for punishing Mexico are excellent, but you’ll have to read the whole piece.