Sen. John HoevenJohn Henry HoevenPoll: McConnell is most unpopular senator McConnell ups pressure on White House to get a budget deal Senators introduce bill to prevent border agency from selling personal data MORE (R-N.D.) endorsed Mitt Romneys presidential campaign and will serve as co-chairman of his North Dakota operation, the campaign announced Friday.

It is an honor for us to join Governor Romney’s campaign,” Hoeven in a news release. Getting our country on the right track will require lessening the regulatory burden on businesses, reducing spending, reforming taxes and utilizing our energy resources here in the United States. Mitt Romney has laid out conservative solutions such as these to fix our country’s problems and I look forward to working with him to ensure that North Dakota is a leader in our country’s economic revitalization.”

Hoeven, who like Romney is a former governor, is the sixth senator to endorse Romney, who leads in congressional endorsements by a wide margin. No other Republican candidate has more than one senator’s backing.

North Dakota is certainly not a key battleground state in the GOP nomination, but Hoeven was a popular governor and won election to the Senate with 76 percent of the vote. His endorsement is the latest sign that the Republican establishment is starting to line up behind Romney.