President Donald Trump and Prime Minister Benjamin Netanyahu held a discussion by phone Thursday night in which they discussed U.S. strategy on Iran and Netanyahu aired his concerns about maintaining security borders and the sale of F-35s to Turkey.

The prime minister warned Trump that Turkish President Recep Tayyip Erdoğan’s rhetoric on Israel is growing increasingly dangerous, with Erdoğan recently saying that Zionism is a “dangerous ideology” that threatens Turkey’s survival. Turkey’s Foreign Minister Hakan Fidan also said in an interview with the CNN affiliate in Turkey that Israel has become an international problem and a “burden that humanity can no longer bear.”

Netanyahu reiterated that the potential sale of F-35s to Turkey could shift the power balance in the Middle East and asked Trump to consider selling a downgraded version so that Israel would still be guaranteed air superiority.

In response to a recent statement by Trump that the IDF will withdraw from southern Lebanon, Netanyahu emphasized the crucial need for Israel to maintain its security border with Lebanon.

Trump updated Netanyahu on U.S. operations against Iran. Israel is not expected to participate during this phase, but Israeli officials said they are prepared for any scenario.

After the phone call, the prime minister’s office issued a statement saying that the call was part of the “continuous contact” between the two leaders and that “continued coordination between the countries in various sectors was established.”