Joe Biden on Wednesday sought to shift the national political conversation back to the coronavirus, an issue he and his campaign thinks will sink President Trump’s reelection effort.

Biden for the last week has mostly spent his time pushing back on Trump’s claims that Democrats are to blame for sometimes violent protests in places like Portland, Ore., and Kenosha, Wis.

It was an effort that came after Democrats worried he was ceding ground to Trump on an issue the White House prefers to be central to the fall campaign.

The shift back to the coronavirus was an effort by Biden to go back on offense, and put Trump on defense over his handling of the pandemic.