A growing partnership between Israel and Arab leaders arrayed against the threat of Iran likely made it easier for President Trump to recognize Jerusalem as the capital of Israel, according to a leading Republican senator.

“The Arab world has changed over time … and it is now in a situation where the greatest threat to stability and security in the Middle East is Iran,” Sen. Tom Cotton, R-Ark., told the Washington Examiner. “And therefore you have a strong alignment of interests between Arab nations and Israel. While they might not prefer this choice [to recognize Jerusalem as Israel’s capital], they understand that their main enemy — that Israel shares — is Iran.”