Former US president Barack Obama speaks during a midterm campaign rally in Georgia. (EPA Images pic)CHILLICOTHE: Neither man is on the ballot but Republican president Donald Trump and Democratic former president Barack Obama took prominent roles on the campaign trail on Wednesday, with less than a week to go before congressional races that could shift the balance of power in Washington.
While Trump has been on a weeks-long campaign blitz that has underlined Republican concerns about losing control of Congress for the final two years of his presidency, Obama had kept a relatively low public profile until the past week, during which he has delivered blistering speeches criticising Trump.
Thirty-five of the 100 Senate seats and all 435 seats in the House of Representatives are being contested next Tuesday.
