What do "there" and "here" refer to? It seems that "there" refers to Trump's bid to reverse the election results and "here" refers to a starting point of that bid. But this explanation doesn't sound natural to me. So I guess that "gets there from here" is perhaps an idiom to refer to "why things have become so". I am not sure.
What does "how it gets there from here" mean?
On Monday, some Republicans expressed what appeared to be a grudging acknowledgment that Mr. Biden had prevailed. Senator Lindsey Graham of South Carolina, who had enthusiastically backed Mr. Trump’s bid to reverse his loss, told CNN that he had spoken with Mr. Biden and conveyed that he would work with him when possible. “It’s a very, very narrow path for the president,” Mr. Graham said of Mr. Trump. “I don’t see how it gets there from here, given what the Supreme Court did.”