Former President Donald Trump started the year with a modest lead in polling against President Joe Biden — but there are already cracks starting to emerge in his bid to retake the White House. And the Biden campaign is planning to unleash a blitz of attacks capitalizing on these vulnerabilities. According to Politico, Trump is already beginning to take messaging hits as he assumes the role of presumptive nominee. Want more breaking political news? Click for the latest headlines at Raw Story. “On a call with staff on Friday, a senior Trump campaign adviser lamented some of the recent news cover…