US President Joe Biden and Vice President Kamala Harris pushed Israeli Prime Minister Benjamin Netanyahu to agree a Gaza ceasefire Thursday, with friendly greetings masking tense ties as well as questions over Biden’s relevance. Just days after the 81-year-old Biden’s stunning announcement that he would not seek reelection, he and Netanyahu put on a good-humoured show in their first meeting at the White House during Biden’s presidency. “From a proud Zionist Jew to a proud Zionist Irish American, I want to thank you for 50 years of public service and 50 years of support for the State of Israel,…