by Dangulica
If OPS are tied then US event is resolved first.4.5.C in the rules:
The card with the higher Headline Value takes effect first. In the event of a tie, the Headline Event played by the US player goes into effect first.
• Scoring cards may be played during the Headline Phase. However, they are considered to have a Headline Value of zero (0) and always take effect second. If both players select a scoring card as their Headline Cards, the US player’s scoring card takes effect first.
• Scoring cards may be played during the Headline Phase. However, they are considered to have a Headline Value of zero (0) and always take effect second. If both players select a scoring card as their Headline Cards, the US player’s scoring card takes effect first.