Unfortunately for the party, and for McConnell, the ad appeared to give Blankenship a boost in the polls-raising the uncomfortable question of whether West Virginia Republicans are supporting him despite his blatantly racist ads, or because of them.
Blankenship, the former chief executive officer of coal company Massey Energy, was released from prison last year after serving a year for safety violations after a 2010 blast in West Virginia that killed 29 miners.
In a recent TV ad, he also attacked Senate Majority Leader Mitch McConnell (R-Ky.), Chao's husband, accusing him of creating "millions of jobs for China people".
"To the great people of West Virginia we have, together, a really great chance to keep making a big difference", tweeted Trump. Problem is, Don Blankenship, now running for Senate, can't win the General Election in your State No way!More news: Mass arrests across Russian Federation as Putin foes protest inauguration
Controversial Republican Senate candidate Don Blankenship has mounted a competitive bid in the state of West Virginia ahead of the highly anticipated Tuesday night primary, national and state Republican operative sources tell ABC News.
Blankenship is running against Rep. Evan Jenkins and state Attorney General Patrick Morrisey.
"The President is a very busy man and he doesn't know me, and he doesn't know how flawed my two main opponents are in this primary", Blankenship said.More news: Yaya Toure to leave Manchester City, says Pep Guardiola
President Donald Trump has insisted his campaign did not collude with Russian Federation to help him win the election. Democrats have their own intraparty drama that could portend what happens in November, which we'll get to.
All three leading candidates in the GOP primary have tried to attach themselves to Trump by emphasizing their commitment to his agenda.
The Republican president maintains a strong approval rating in West Virginia at 61 points, according to March polling from Morning Consult. "All the ingredients are there for Blankenship to win-anti-Washington/anti-McConnell rhetoric and a lot of money while the other guys attack each other", the strategist said. Trump wrote on the social media platform.
"I'm proud to have President Trump's support", he tweeted.
The victor will face Sen.More news: John Peterson soars into Quail Hollow lead behind pair of eagles
In the Alabama race, Trump endorsed Moore, who faced allegations of past sexual misconduct. "I'm the only candidate in this race who has backed Donald Trump since day one, and I'm working side-by-side with him to America, and West Virginia, Great Again". Democrat Doug Jones ended up winning the seat.