Donald Trump declined to take part in a sit-down interview with “60 Minutes” in an apparent dispute over fact-checking, but MSNBC’s Jonathan Lemire said his refusal actually hints at growing strife inside his re-election campaign. Kamala Harris sat down with the CBS News program, as every major party candidate has done since its launch in 1968, while correspondent Scott Pelley told viewers that Trump’s campaign objected to real-time fact-checks and demanded an apology from correspondent Leslie Stahl for pushing back on his claims four years ago about Hunter Biden’s laptop. “Last night, as I wa…