Iran and the US exchange messages via Pakistan as Tehran says Washington 'constantly shifts its position,' with Iran’s vice president claiming the US is 'begging' to negotiate on Hormuz, days before Trump’s deadline and amid a standoff with Lebanon over its envoy Iran said Monday afternoon that U.S. demands raised in indirect talks between the sides were “excessive and unreasonable,” against the backdrop of a deadline set by President Donald Trump for a deal. Iranian Foreign Ministry spokesman Esmail Baghaei ... [1961 chars]