Republicans and Democrats clashed on Twitter over President Obama’s healthcare law ahead of a House repeal vote.

On the same day House Republicans planned a vote to repeal the president’s signature legislation, House Oversight Committee chairman picked a fight with the White House, challenging his followers to say in three words why the law should be repealed.

One popular response from conservatives was to use the words of Democratic Sen. Max BaucusMax Sieben BaucusFarmers hit Trump on trade in new ad Feinstein’s trouble underlines Democratic Party’s shift to left 2020 Dems pose a big dilemma for Schumer MORE (Mont.), who last month warned the implementation of the law would be a “train wreck.”

But Democrats didn’t sit passively by as their political opponents publicly trashed the law.

The White House tweet provoked Speaker John Boener (R-Ohio) to return to a phrase he used to describe the Obama administration earlier in the day at a press conference where he discussed the IRS controversy.

The back and forth escalated from there.