The forthcoming Tuesday debate is seen as a crucial juncture for ex-President Donald Trump in the presidential contest. However, there is growing apprehension among Republicans that Trump may undermine his own chances by resorting to personal attacks on Vice President Kamala Harris. What Happened: Trump’s advisers and key GOP officials have been encouraging him to concentrate on critiquing Harris’s policy record. Despite this advice, Trump has shown a propensity for personal attacks, reported Politico. Former House Speaker Newt Gingrich expressed hope that Trump would maintain composure during…