President Joe Biden is set to host Ireland’s prime minister on Friday, after the COVID-19 pandemic scuttled the longstanding St. Patrick’s Day meetup two years in a row. Leo Varadkar, known as the taoiseach, and his partner, Matthew Barrett, will attend a breakfast with Vice President Kamala Harris and her husband, Doug Emhoff. Then they will head to the U.S. Capitol for a lunch with congressional leaders and Biden before the two leaders convene. […] Biden, who often speaks of his Irish heritage and is fond of quoting Irish poets, declared March Irish-American heritage month. The White House is even...