Open this photo in gallery: U.S. Senator Lisa Murkowski (R-AK) walks to the Senate Chamber ahead of a session on Capitol Hill in Washington on Jan. 22.Jon Cherry/Reuters Sen. Lisa Murkowski, a moderate Republican from Alaska, has never been afraid to stand up to U.S. President Donald Trump – perhaps until now. Ms. Murkowski has generally been her own person when it comes to dealing with the seismic events Mr. Trump has set off in America. She was one of seven Republicans who voted to convict Mr. Trump in his second impeachment trial in 2021. She endorsed former South Carolina...