Biden, Trump, Obama barnstorm Pennsylvania in final midterms dash
Source: Reuters
PHILADELPHIA, Nov 5 (Reuters) - The biggest names in Democratic and Republican politics -- Joe Biden, Barack Obama and Donald Trump -- head to Pennsylvania on Saturday hoping to tip the balance in a closely contested midterm race that could determine control of the U.S. Senate.Former President Obama caps a five-state tour aimed at stemming his party's losses in Tuesday's congressional elections with appearances…