Sen. Bernie Sanders: I Will Boycott Netanyahu Speech

Sanders spoke at the Brookings Institution on Monday.

Sanders, the longest-serving Independent in Congress, said it was wrong that the president wasn't consulted about the prime minister's visit. His statement came during a Q&A session after a speech at the Brookings Institution.

Sanders also said he is considering running as a Democrat if he decides to run for president in 2016.

"To do it well we would have to put together the strongest grassroots movement in the modern history of this country where millions of people are saying 'you know what, enough is enough," he said during a Q&A session at the Brookings Institution, a DC think tank.

But, he added, "It is not my style to trash people."

Sanders, who released his 12-point-plan to rebuild the middle class last month, lamented that the country is "moving rapidly away from our democratic heritage into an oligarchic form of society – where we are experiencing a government of the billionaire class, by the billionaire class and for the billionaire class," he said in his remarks.