I know the headline said CANCELLING, but if you read the article in its entirety...

"As a result, Israeli officials are considering whether Netanyahu should speak to a closed-door session of Congress, rather than in a prime-time TV address, so as to drain some of the intensity from the event, a source said.
Another option is for the prime minister to make his speech at the annual meeting of the American Israel Public Affairs Committee in Washington the same week, rather than in Congress.
“The issue has been under discussion for a week,” said a source close to the prime minister’s office. “(Netanyahu) is discussing it with Likud people. Some say he should give up on the speech, others that he should go through with it.”
But Netanyahu told voters from the Russian speaking community on Monday evening that he was determined to discuss Israel’s objections in Washington to an emerging deal withIran but he did not say if that meant a public speech in Congress.
“I am … determined to go to Washington to present Israel’s position to the members of Congress and the American people,” Netanyahu said, repeating that nuclear weapons in Iran’s hands would constitute an existential threat to Israel.

So we shall see. I think it important that our President and congress (as the ultimate decision makers) hear from Israel on this issue. They are the ones with the most to lose.

Hope the President was honest when he said they talk frequently.