The dollar eased on Monday in the initial reaction to US President Joe Biden’s decision to end his reelection campaign, clearing the way for another Democrat to challenge Donald Trump. China’s yuan was largely unfazed by the central bank’s decision to cut a key interest rate. The US currency slipped 0.08 percent to 157.38 yen early in the Asian day, while the euro gained 0.11 percent to $1.0895. Biden announced he was exiting the race on Sunday, and endorsed Vice President Kamala Harris to replace him as the Democratic candidate in the November election. Former President Trump, the Republican …