Under the Trump administration, alliance engagement prioritizes trade-offs and quid pro quo exchanges, giving short shrift to multilateral mechanisms. On security, Trump exploits the asymmetric dependence on U.S. security guarantees, and pressures allies into ceding their sovereignty in exchange for U.S. security assurances. The tariffs under Trump 1.0 back in 2018 mainly targeted China. By imposing reciprocal tariffs and protection fees, Trump puts economic pressure on allies and extracts benefits for the U.S. Military, political, economic, and technological ties within these alliances will splinter and compartmentalize, and institutional linkages between different alliance networks will weaken.