I travel with several passports as entering and leaving the US requires a US passport, and same with the UK. I also hold CAN as I was born there. Never naturalized or swore an oath anywhere else and that’s very important. Just eligible for and acquired them. At least they are all allies right! And I’m fine stating and proving my allegiances. With that add official and dip for a total of 5. Only issues I have are returning to the US they typically put me in the secondary line when I use the blue passport for personal travel. But there is nothing illegal about it.