Nigerian President Muhammadu Buhari will be the first African leader to be received by US President Donald Trump when he comes to Washington for talks later.
They are expected to discuss common economic and security interests.
But many will also watch the discussions after a dispute over Mr. Trump's alleged use of the word "shithole" to describe African nations.
Mr. Trump denies that he is a racist, according to the coarse remark.
What is the agenda for Trump-Buhari? Talks
The two leaders may be interested in leaving the scandal behind in order to focus on more pressing issues, writes BBC Nigeria correspondent Mayeni Jones.
At home, President Buhari faces numerous security challenges, including the nine-year uprising of the Boko Haram jihadists in the northeast and growing insecurity in midfield.
The fight against terrorism is a priority for both governments, adds our correspondent.
The White House has sold $ 496 million counterinsurgency aircraft to Nigeria to help fight Boko Haram.
- Nigeria's Boko Haram attacks in numbers
In Washington, Trump and Buhari He will also discuss ways to deepen economic cooperation between the two countries
Even for Buhari, who is due to be re-elected in 201
After the talks, the Nigerian head of state should meet companies that specialize in agriculture.
High-level Nigerian government officials will also discuss a series of projects with executives from major US haulage companies.