UPDATE — this extends our earlier coverage: Senators Invoke Graham Act, Press Trump to Speed Up Russia Sanctions

Two new developments show the push splitting into separate fronts — one in Congress, one in Brussels.

Six US senators are calling on the Trump administration to "immediately reverse course" on a carve-out that lets Russian diesel keep reaching market despite sanctions, according to the Indianapolis Business Journal. Their argument: an exemption built into a sanctions regime defeats the regime, since diesel exports are a major source of Kremlin revenue.

Separately, EU foreign policy chief Kaja Kallas urged Washington to align its sanctions with the bloc's own measures against Moscow, arguing that coordinated transatlantic pressure — not separate tracks — is what hurts Russia's war chest, per Anadolu Ajansı.

HYPOTHESIS: the two moves suggest Congress and the EU, after months of appearing to escalate Russia sanctions in lockstep, are finding the Trump administration itself an obstacle — on the US side through an exemption its own senators oppose, on the EU side through reluctance to match Brussels' sanctions architecture. Supporting this: both appeals target the administration rather than each other, and both frame the gap as undermining pressure on Moscow's energy revenue. Against this: carve-outs and calls for alignment are routine friction in any sanctions regime and don't alone prove a strategic rift; neither source quotes a White House response.

Watch whether the Trump administration answers either appeal before the next EU sanctions package, and whether the senators' push gains enough bipartisan support to force a vote rather than remain a protest letter.