Shifting explanations for withholding aid draw GOP alarm

FILE - In a Dec. 13, 2018, file photo, then-Ohio Gov. John Kasich sits for an interview with The Associated Press in Columbus. Kasich, who ran against President Donald Trump in the 2016 Republican primary, says he supports impeachment. Kasich said Friday, Oct. 18, 2019, on CNN that the final straw was when acting White House chief of staff Mick Mulvaney acknowledged that Trump’s decision to hold up military aid to Ukraine was linked to his demand that Kyiv investigate the Democratic National Committee and the 2016 U.S. presidential campaign. (AP Photo/John Minchillo, File)

White House chief of staff Mick Mulvaney announces that the G7 will be held at Trump National Doral, Thursday, Oct. 17, 2019, in Washington. (AP Photo/Evan Vucci)

President Donald Trump speaks during an event where he congratulated astronauts Jessica Meir and Christina Koch as they conduct the first all-female spacewalk, from the Roosevelt Room of the White House, Friday, Oct. 18, 2019, in Washington. (AP Photo/Evan Vucci)

WASHINGTON — The shifting White House explanation for President Donald Trump’s decision to withhold military aid from Ukraine drew alarm Friday from Republicans as the impeachment inquiry brought a new test of their alliance.