The Tennessee Republican denied tainting a United Auto Workers election.
Attorneys say there is precedent for federal officials to toss the results in Chattanooga.
The UAW is claiming "extraordinary interference" from politicians, including Sen. Bob Corker.
Obama said opponents “are more concerned about German shareholders than American workers."
Workers at a Volkswagen plant in Chattanooga, Tenn., are voting this week on the possibility of joining the United Auto Workers (UAW) union.
The vote, which is scheduled to conclude on Friday, is seen as a crucial test of the trend in recent years for foreign automakers to choose locate plants in Southern states to avoid labor issues that are experienced by American car companies, which are based in the Midwest.
The push to unionize the Chattanooga Volkswagen plant has drawn the attention of Tennessee politicians like Sen. Bob Corker (R-Tenn.), who urged autoworkers this week to vote against joining the UAW.
The transportation sector gained 9,900 jobs in January as the national unemployment rate fell to 6.6 percent, according to statistics released by the Department of Labor on Friday.
The Labor Department’s Bureau of Labor Statistics (BLS) said there were 4,562,600 jobs in transportation in January, compared to 4,552,700 in December.
The figure was part of a 113,000 increase in overall jobs in January, the BLS said.
Riverbed erosion contributed to just one in 200 underground pipeline ruptures, the Transportation Department concluded.
The transportation sector gained nearly 31,000 jobs in November as the national unemployment rate fell to seven percent, according to statistics released by the Department of Labor on Friday.
The Labor Department’s Bureau of Labor Statistics said there were 4,534,600 jobs in transportation in November, compared to 4,504,100 in October.
The transportation sector did not gain any new jobs in October, according to statistics released by the Department of Labor on Friday.
The Labor Department’s Bureau of Labor Statistics said there were 4,493,600 jobs in transportation in October, the same number that were available in September.