Prime Minister Benjamin Netanyahu sent a letter to U.S. President Barack Obama on Tuesday congratulating him on his inauguration for a second term.

The Prime Minister's Office said that Netanyahu also recently sent Obama a New Year's greeting and that a few days ago Obama sent Netanyahu a letter saying "Looking forward to continuing working with you in the new year."

Labor Chairwoman Shelly Yachimovich also sent Obama a congratulatory letter.

"You have a true friendship with Israel and we appreciate the extraordinary security assistance that you gave to Israel during your first term and your support in the international arena," Yachimovich said in a letter to Obama. "I'm sure that your leadership and attentive ear will stand by Israel in our strive to achieve peace and stability in the Middle East. Your vision and socio-economic worldview are exemplary in regards to a state's responsibilities toward its citizens."

Obama was officially sworn-in on Sunday at the White House and was ceremonially sworn-in on Monday in front of hundreds of thousands of people on the west side of the U.S. Capitol building. Obama won re-election as president when he defeated Republican challenger Mitt Romney in November.