Joe Biden 's strategy appears "unconvincing" amid the escalating tensions in the Middle East, an expert has claimed, as the US President made yet another blunder by confusing two cities during an interview. The 81-year-old's cognitive state has long been questioned due to numerous gaffes in public appearances, where he has appeared dazed and confused, mixing up names and places. So has his rival in the upcoming elections, 77-year-old Donald Trump . A politics expert sees the choice that