So my question is whether church leaders around the world (in and outside the US) should be holding the American church leaders to account who are supporting Trump and discussing the issue. Perhaps they are behind closed doors but Paul would openly write to criticise churches who led their people astray.
"No one engaged in warfare entangles himself with the affairs of this life, that he may please him who enlisted him as a soldier." (2 Timothy 2:4)
"Do you not judge those who are inside? But those who are outside God judges." (in 1 Corinthians 5:12-13)
So, it is not our responsibility to control evil people of Satan's kingdom. And I would be careful about who you say is leading God's church in the United States, because the scripture you have quoted goes for qualified Christian leaders; in case ones in religious power do not do what is right, these are not Jesus Christ's church leadership in America; because they are not qualified . . . like your scripture says > 1 Timothy 3:1-10. And so, it is possible they are not accountable to Jesus Christ's approved leadership. And according to what I read in 1 Corinthians 5:12-13, it is not my job description as a Christian, to control wicked and evil people. I will offer votes, but most of all I pray and need to obey God, myself.
The Bible says God's people "first of all" need to pray for any and all people > 1 Timothy 2:1-4. First, then, trust God to have His way with this world, howsoever He pleases, thanking Him for how He is succeeding. This scripture > 1 Timothy 2:1-4 says what we Jesus people need to do > "first of all" > but I get the impression there are people who are very busy with trying to hold politicians accountable, yet they themselves do not obey what God's word says to do "first of all" > 1 Timothy 2:1-4 < how much attention do you give to this scripture??
And lead by example >
"nor as being lords over those entrusted to you, but being examples to the flock." (1 Peter 5:3)
God knows who His obedient are, and He makes a way for His obedient to reach people . . . by example, not by controlling . . . and by means of prayer "first of all". So, God's obedient are already doing better than what you might be looking for. You can not control wrong people and hold them accountable; ones need to first trust in Jesus so they can obey God.
God does not just use people. He might turn wicked people's action and power to His good, though. But most of all God is saving souls so we spend eternity with Jesus.
And another thing > if Donald and certain religious leaders are wrong like you indicate, they are the tip of a very big iceberg. And the iceberg you can see has the support of two-thirds of the iceberg which is below the surface!! So, in case you manage to chip away and/or melt away a few tons of ice at the top, it will be soon replaced by a few other tons of ice supported by the billions of tons lower.
So . . . people need to defect to Jesus >
"If anyone desires to come after Me, let him deny himself, and take up his cross daily, and follow Me." (in Luke 9:23)
"'Come to Me, all you who labor and are heavy laden, and I will give you rest. Take My yoke upon you and learn from Me, for I am gentle and lowly in heart, and you will find rest for your souls. For My yoke is easy and My burden is light.'" (Matthew 11:28-30)
And Jesus makes His sheep able to tell the difference between His real leaders and ones not qualified > John 10:1-30. So, I would be prayerfully careful about who you claim is a church leader in the United States. The example leaders already are obeying God, and we see how effective obedience is > like with Abraham >
"'In your seed all the nations of the earth shall be blessed, because you have obeyed My voice.'" (Genesis 22:18)
So, make sure you obey.