MSNBC’s Joe Scarborough mocked Republican lawmakers for exposing their latest impeachment gambit as a fraud from the start. House Republicans have already held one impeachment hearing for Homeland Security Secretary Alejandro Mayorkas over border security, but they’re also threatening to reject a bipartisan Senate bill on immigration because it might help President Joe Biden. “Think about this,” Scarborough said. “They want to impeach Mayorkas because, they say, there’s not order at the border, and then they say, ‘We’re not going to do anything to fix the border because it may also help Joe Bi…