From The Federalist:

For various reasons, perhaps including his waffling on guns, it is not certain that Trump will be reelected in 2020. But if he stops listening to members of his family who support gun control, if the Republican Senate quashes Democrats’ gun schemes, if Trump is reelected, if the Republicans hold the Senate, and if they re-take the House of Representatives—a lot of ifs—he and the Republicans could change federal gun laws for the better.
Aggressively pursuing these changes and explaining to the American people why the changes are warranted would help protect the right of the people to keep and bear arms. By now, supporters of that right should have figured out that they will never win the war to protect it if they remain catatonic when the opportunity to pass good laws exists, then cower when Democrats and the liberal-left media attack in the minutes, hours, and days after a high-profile crime involving a gun.