Trump has long been obsessed with bringing the Russian leader to global summits despite objections from—well—nearly everyone else. Planning for the December gathering in Miami comes as security experts warn that escalations between Ukraine and Russia risk deepening the war. Key points and original sources are listed below.

• Trump has long been obsessed with bringing the Russian leader to global summits despite objections from—well—nearly everyone else.S1

• Planning for the December gathering in Miami comes as security experts warn that escalations between Ukraine and Russia risk deepening the war.S2