Republicans are growing anxious about an emerging Texas primary engulfing one of their longest-serving senators, fearful that a hugely expensive intraparty feud will have major ramifications across the map in next year’s midterms.

Senate Republicans plugged away overnight and into early Saturday morning to approve their multitrillion-dollar tax breaks and spending cuts framework, hurtling past hardened Democratic opposition.

The Republican Party leadership is urging Donald Trump to step in and quash a challenge to a senior GOP senator who may face a bruising primary fight for his seat. According to a report from CNN, Senate Majority Leader John Thune (R-SD) has requested the president endorse Sen.