Sanford: 'I don't know' if I would vote for Trump in 2020

Sanford: 'I don't know' if I would vote for Trump in 2020
© Greg Nash

Former South Carolina Rep. Mark SanfordMark SanfordTrump challenger Bill Weld rules out 2020 independent bid Judge throws out lawsuit against South Carolina GOP for canceling 2020 primary The Hill's Campaign Report: Late bids surprise 2020 Democratic field MORE, a Republican challenging President TrumpDonald John TrumpLev Parnas implicates Rick Perry, says Giuliani had him pressure Ukraine to announce Biden probe Saudi Arabia paid 0 million for cost of US troops in area Parnas claims ex-Trump attorney visited him in jail, asked him to sacrifice himself for president MORE in a longshot primary campaign, said on Sunday that he isn't sure if he would still consider voting for Trump in 2020, despite allegations that the president solicited foreign interference to benefit him politically. 

Host Jake TapperJacob (Jake) Paul TapperSteyer says 'grassroots organizing' in Nevada, South Carolina got him on debate stage Pentagon chief says he 'didn't see' intelligence suggesting Iran planned to attack four US embassies Ex-White House press, military officials call on Grisham to restart regular briefings MORE asked Sanford on CNN's "State of the Union" if he would vote for Trump over Vice President Joe BidenJoe BidenLev Parnas implicates Rick Perry, says Giuliani had him pressure Ukraine to announce Biden probe Ex-Obama official on Sanders-Warren feud: 'I don't think it played out well for either of them' Parnas says he doesn't think that Joe Biden did anything wrong regarding Ukraine MORE if they end up being the candidates in 2020. 

"I don’t know," Sanford responded. "What I've said is I'm an issue guy." 

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Sanford said he's going to base his decision on "who is going to be closest to me" with a focus on debt and spending. 

Former Illinois Rep. Joe WalshJoe WalshWalsh plans protest at RNC headquarters over 'nakedly anti-Democratic' primary cancellations Pelosi announced as lead guest on season premiere of 'Real Time with Bill Maher' Rep. Collins says Democrats are 'in love with terrorists,' 'mourn Soleimani' MORE, a fellow 2020 GOP challenger, said there is "no way in hell" he would vote for Trump.

"I'm running against President Trump because he's unfit," Walsh said. 

"The debate is about Trump, period," he added. 

The Republicans were also split on where they stand on impeachment, with Walsh saying the president deserves to be impeached based on his public actions alone and Sanford saying Congress needs to follow a formal investigation process. 

Trump is facing an impeachment inquiry after a whistleblower came forward with allegations that Trump asked Ukraine to investigate Biden and his son. 

A partial memo of a call between Trump and Ukrainian President Volodymyr Zelensky shows Trump asking the foreign leader to investigate the Bidens. 

Trump publicly called on China and Ukraine to investigate the Bidens when speaking to reporters last week.