Why did Trump drop lawsuits in Arizona and Pennsylvania today?

absolutely everyone except his hardcore supporters and his staff have said he doesn't have a leg to stand on, election security officials said there is no evidence to back Trump's claims, even George Bush is not backing him up on this and many other republicans are against him now. He could have left with dignity but now the history books will mock him forever. a list of supposed dead people who had voted for Biden and was being circulated on the net has been proven to be completely fake. its all very embarrassing for republicans and for this reason he is losing support from them.