Israeli Prime Minister Benjamin Netanyahu is expected to address the U.S. Congress tomorrow about the perils of striking a nuclear deal with Iran.  Netanyahu, not generally known for his measured rhetoric, has been vociferous in his public statements about the dangers of such compromise, warning that it will allow Iran to “rush to the bomb” and that it amounts to giving the country “a license” to develop nuclear weapons.

It is worth remembering, however, that Netanyahu has said much of this before. Almost two decades ago, in 1996, Netanyahu addressed a joint session of Congress where he darkly warned, “If Iran were to acquire nuclear weapons, this could presage catastrophic consequences, not only for my country, and not only for the Middle East, but for all mankind,” adding that, “the deadline for attaining this goal is getting extremely close.”

Almost 20 years later that deadline has apparently still not passed, but Netanyahu is still making dire predictions about an imminent Iranian nuclear weapon. Four years before that Congressional speech, in 1992, then-parliamentarian Netanyahu advised the Israeli Knesset that Iran was “three to five years” away from reaching nuclear weapons capability, and that this threat had to be “uprooted by an international front headed by the U.S.”

In his 1995 book, “Fighting Terrorism,” Netanyahu once again asserted that Iran would have a nuclear weapon in “three to five years,” apparently forgetting about the expiration of his old deadline.

For a considerable time thereafter, Netanyahu switched his focus to hyping the purported nuclear threat posed by another country, Iraq, about which he claimed there was “no question” that it was “advancing towards to the development of nuclear weapons.” Testifying again in front of Congress in 2002, Netanyahu claimed that Iraq’s nonexistent nuclear program was in fact so advanced that the country was now operating “centrifuges the size of washing machines.”

Needless to say, these claims turned out to be disastrously false. Despite this, Netanyahu, apparently unchastened by the havoc his previous false charges helped create, immediately went back to ringing the alarm bells about Iran.

A 2009 U.S. State Department diplomatic cable released by Wikileaks described then-prime ministerial candidate Netanyahu informing a visiting Congressional delegation that Iran was “probably one or two years away” from developing weapons capability. Another cable later the same year showed Netanyahu, now back in office as prime minister, telling a separate delegation of American politicians in Jerusalem that “Iran has the capability now to make one bomb,” adding that alternatively, “they could wait and make several bombs in a year or two.”

In statements around this time made to journalists, Netanyahu continued to raise alarm about this supposedly imminent, apocalyptic threat. As he told The Atlantic’s Jeffrey Goldberg in a 2010 interview, “You don’t want a messianic apocalyptic cult controlling atomic bombs,” adding, “that’s what is happening in Iran.”

In 2012 Netanyahu said in closed talks reported by Israeli media that Iran is just “a few months away” from attaining nuclear capabilities. Later that same year, he gave a widely-mocked address at the United Nations in which he alleged that Iran would have the ability to construct a weapon within roughly one year, while using a printout of a cartoon bomb to illustrate his point.

Despite this heady rhetoric, Netanyahu’s estimates of an imminent Iranian nuclear bomb have consistently been at odds with analyses made by his own intelligence agency. In 2011, departing Mossad intelligence chief Meir Dagan said in his final intelligence summary that, contrary to Netanyahu’s repeated statements at the time, an Iranian nuclear weapon is in fact not imminent, and that any military action against the country could end up spurring the development of such a weapon.

Just last week, leaked intelligence cables reported by Al Jazeera revealed that at roughly the same time in 2012 that Netanyahu was brandishing his cartoon bomb and telling the United Nations that Iran was close to obtaining a nuclear weapon, Israeli intelligence had actually determined the country was “not performing the activity necessary to produce weapons.”

The conclusion from this history is inescapable. Over the course of more than 20 years, Benjamin Netanyahu has made false claims about nuclear weapons programs in both Iran and Iraq, inventing imaginary timelines for their development, and making public statements that contradicted the analysis of his own intelligence advisers.

Despite this, he continues to be treated by lawmakers and media figures as a credible voice on this issue.

When Netanyahu gives his address to Congress, he can likely be counted on to say much the same thing he’s been saying for the past two decades about an impending Iranian nuclear threat, and credulous pundits and politicians can be counted on to believe him.

Photo: Richard Drew/AP