NATO leaders gather Tuesday in Washington for a summit aimed at showing resolve against Russia and support for Ukraine -- but the meeting is set to be overshadowed by US President Joe Biden's fight for political survival.
The 81-year-old leader will try to use the three days of pomp marking NATO's 75th anniversary to reassure allies over US leadership, and his own ability to govern, as calls grow for him to quit the fight for a second term in office.
