President Trump on Tuesday appeared to suggest lawmakers should turn their focus to strengthening background checks for gun purchases in the wake of the deadly mass shooting at a Florida high school last week.

“Whether we are Republican or Democrat, we must now focus on strengthening Background Checks!” Trump tweeted.

Trump also posted a tweet slamming CNN and MSNBC for purportedly covering a rally protesting Trump that was organized by Russians posing as Americans.

Trump’s remarks come after he announced Tuesday that he had directed the Department of Justice to propose regulations that would ban bump stocks, devices that allow semi-automatic guns to be modified to shoot hundreds of rounds per minute.

“We can do more to protect our children. We must do more to protect our children,” Trump said during the announcement.