Sources say President Trump may try to persuade President Putin to send Edward Snowden back to the US MIKHAIL KLIMENTYEV/GETTY IMAGES

Britain fears that President Trump will undermine Nato by striking a “peace deal” with President Putin when the pair meet next month.

Cabinet ministers are worried that Mr Trump may be persuaded to downgrade US military commitments in Europe, compromising Nato countries’ defence against Russian aggression.

Officials are also concerned that he could hand Mr Putin a propaganda victory by cancelling or changing the alliance’s planned military exercises.

Any such move could trigger an existential crisis for the 29-member group, which has guaranteed western security since 1949 by relying on US military might. Nato figures fear that Mr Trump could seek to replicate his “peace agreement” with Kim Jong-un of North Korea, which generated positive coverage. He surprised observers during the negotiations by cancelling US…